Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Sagan, C. (Cornell University Ithaca, N.Y., United States) Date Acquired
August 6, 2013
Publication Date
July 14, 1972
Publication Information
Publication: Nature
Volume: 238
Accession Number
72A36620
Funding Number(s)
CONTRACT_GRANT: NGR-33-010-082
Distribution Limits
Public