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Author is exactly "Carl Sagan and David Morrison"
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Correspondence from Carl Sagan and David Morrison to D. S. Heeschen
Start Date:1969-06-04
Creator:Records of the NRAO
Series:Director's Office Series
Unit:Director's Office Correspondence Unit
Subunit:Heeschen General Correspondence Subunit
Type:Text
Description:Thanks for help and support from NRAO