Carl Sagan: Perbedaan revisi

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* {{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]]
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