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* [http://books.google.co.uk/books?id=HoZdcomupUQC&pg=PA36 A Man whose time Has come—Interview with Carl Sagan by Ian Ridpath, New Scientist 1974 July 4]
* {{IMDb name|755981|Carl Sagan}}
* worldcat id|id=lccn-n79-64998
* [http://wonderfest.org/sagan-prize/l Carl Sagan Prize for Science Popularization]
* [http://dps.aas.org/prizes/sagan Sagan Medal for Excellence in Public Communication in Planetary Science], presented by the American Astronomical Society's Division for Planetary Sciences (AAS/DPS)
* [http://www.seti.org/csc Carl Sagan Center for the Study of Life in the Universe], SETI Institute
* [http://www.csicop.org/si/show/carl_sagans_life_and_legacy_as_scientist_teacher_and_skeptic Carl Sagan's Life and Legacy as Scientist, Teacher, and Skeptic], [[Committee for Skeptical Inquiry]]
* [http://www.skeptic.com/reading_room/our-place-in-the-universe A Tribute to Carl Sagan: Our Place in the Universe],The Skeptics Society
* http://en.wikipedia.org/wiki/Carl_Sagan
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