The Astronomical Perspective: Unicorns and Universes; Planets are Places Sagan, Carl [American Association for the Advancement of Science (AAAS); Reed Division of Math and Natural Sciences; Astronomy], part 1 of 3, 1970-03-16

The Astronomical Perspective: Unicorns and Universes; Planets are Places Sagan, Carl [American Association for the Advancement of Science (AAAS); Reed Division of Math and Natural Sciences; Astronomy], part 1 of 3, 1970-03-16, Box: 2.15, Object: 536A. Reed College AV collection, CA-AV-RSCA-ORPR-US. Reed College Special Collections and Archives. https://archivesspace.reed.edu/repositories/2/archival_objects/29274 Accessed November 27, 2024.