1999

Achenbach, Joel in his “Captured by Aliens” (1999) (available on Amazon USA and on Amazon UK) at pages 62-63 (in Chapter 5), 378 (in the Notes) of the Simon and Schuster hardback edition.

3

1976

Baxter, John and Aktins, Thomas in their “The Fire Came By” (1976) (available on Amazon USA and on Amazon UK) at page 142 (in Chapter 11) of the Futura paperback edition.

1

1990

Billingham, John in an interview in David W Swift’s “SETI Pioneers : Scientists Talk About Their Search for Extraterrestrial Intelligence” (1990) (available on Amazon USA and on Amazon UK) at pages 251, 254 (in the unnumbered chapter entitled “John Billingham”) of the Arizona hardback edition.

1994

Boylan, Richard and Boylan, Lee in their “Close Extraterrestrial Encounters: Positive Experiences With Mysteries Visitors” (1994) (available on Amazon USA and on Amazon UK) at page 201 (in Appendix C, Recommended Readings) of the Wild Flower Press softcover edition.

1

1997

Brin, David in “Making Contact” (1997) (edited by Bill Fawcett) (available on Amazon USA and on Amazon UK) at pages 221-222, 223 (in Section 3) of the Morrow hardback edition.

3

2003

Darling, David in his online encyclopedia, “The Encyclopedia of Astrobiology, Astronomy and Spaceflight” (2003) in the entry entitled “Intelligent Life in the Universe”. The relevant entry is available online at: http://www.daviddarling.info/encyclopedia/I/IntelLife.html

1

1999

Davidson, Keay in his “Carl Sagan: A Life” (1999) (available on Amazon USA and on Amazon UK) at pages 147-150 (in Chapter 6), 168, 196-200 (in Chapter 7), 352-353 (in Chapter 14) of the Wiley softcover edition.

12

1998

Dick, Steven J in his “Life on Other Worlds“ (1998) (available on Amazon USA and on Amazon UK) at page 151 (in Chapter 5) of the Cambridge hardback edition.

1

1996

Dick, Steven J in his “The Biological Universe” (1996) (available on Amazon USA and on Amazon UK) at page 289 (in Chapter 6) of the Cambridge hardback edition.

1

1991

Drake, Frank and Sobel, Dava in their “Is Anyone Out There?“ (1991) (available on Amazon USA and on Amazon UK) at pages 99-100 (in Chapter 5) of the Pocket Books paperback edition.

2

2001

Fitzgerald, Randall in “The Encyclopedia of Extraterrestrial Encounters” (2001) (edited by Ronald Story) (available on Amazon USA and on Amazon UK) at page 270 (in an entry entitled “Intelligent Life in the Universe”) of the New American Library softcover edition, at page 264 of the pdf edition (with the same page numbering in the Microsoft Word edition).

1

2001

Fitzgerald, Randall in “The Mammoth Encyclopedia of Extraterrestrial Encounters” (2001) (edited by Ronald Story) (available on Amazon USA and on Amazon UK) at page 326 (in an entry entitled “Intelligent Life in the Universe”) of the Robinson softcover edition.

1

1998

Fitzgerald, Randall in his “The Cosmic Test Tube” (1998) (available on Amazon USA and on Amazon UK) at pages 345-347 (in Section 5) with a one sentence summary at page 378 (in the Guide To Books) of the Moonlake Media softcover edition.

3

1967

Greenfield, Irving A in his “The UFO Report” (1967) at page 40-42 (in Chapter 4) of the Lancer paperback edition.

3

1999

Hennessey, Roger in his “Worlds Without End : The Historic Search for Extraterrestrial Life” (1999) (available on Amazon USA and on Amazon UK) at page 114 (in Chapter 11) of the Tempus hardback edition.

1

1987

Hoagland, Richard in his “The Monuments of Mars” (1987) (available on Amazon USA and on Amazon UK) at page 213 (in Chapter 12) of the 1992 revised North Atlantic softcover edition.

1

1990

Horowitz, Paul in an interview in David W Swift’s “SETI Pioneers : Scientists Talk About Their Search for Extraterrestrial Intelligence” (1990) (available on Amazon USA and on Amazon UK) at pages 407-408, 409-410 (in the unnumbered chapter entitled “Paul Horowitz”) of the Arizona hardback edition.

4

2000

Koerner, David & LeVay, Simon in their “Here Be Dragons” (2000) (available on Amazon USA and on Amazon UK) at page 172 (in Chapter 7) of the Oxford softcover edition.

1

1999

Poundstone, William in his “Carl Sagan: A Life in the Cosmos” (1999) (available on Amazon USA and on Amazon UK) at pages 76-79, 90-92 (in the chapter entitled “Cambridge 1963-1968”) of the Owl Books softcover edition.

7

1966

Sagan, Carl in “Intelligent Life in the Universe” (1966) (by Iosef Shmuelovich Shklovskii and Carl Sagan) at pages vii-viii (in the Preface) of the Picador softcover edition.

2

1990

Sagan, Carl in an interview in David W Swift’s “SETI Pioneers : Scientists Talk About Their Search for Extraterrestrial Intelligence” (1990) (available on Amazon USA and on Amazon UK) at pages 213, 218 (in the unnumbered chapter entitled “Carl Sagan”) of the Arizona hardback edition.

2

1979

Sagan, Carl in his “Broca’s Brain” (1979) (available on Amazon USA and on Amazon UK) at pages 82-83 (in Chapter 6) of the Coronet paperback edition.

2

1974

Salisbury, Frank in his “The Utah UFO Display: A Biologist’s Report” (1974) (available on Amazon USA and on Amazon UK) at page 237 (in the Appendix entitled “Annotated Bibliography”) of the Devin Adair hardback edition.

1

1990

Shklovskii, Iosef S in an interview in David W Swift’s “SETI Pioneers : Scientists Talk About Their Search for Extraterrestrial Intelligence” (1990) (available on Amazon USA and on Amazon UK) at page 173 (in the unnumbered chapter entitled “Iosef S Shklovskii”) of the Arizona hardback edition.

1

1991

Shklovskii, Iosif in his “Five Billion Vodka Bottles to the Moon” (1991) (available on Amazon USA and on Amazon UK) at page 249-253 (in Chapter 24) of the Norton hardback edition.

5

1997

Spencer, John and Spencer, Anne in their “Fifty Years of UFOs” (1997) (available on Amazon USA and on Amazon UK) at page 78 (in the unnumbered chapter entitled “1967-1977”) of the Boxtree hardback edition.

1

1964

Sullivan, Walter in his “We Are Not Alone” (1964) (available on Amazon USA and on Amazon UK) at page 17 (in Chapter 1) of the Signet paperback revised editions.

1