Additions to the flora of the Spotted Ridge Formation in central Oregon /

Bibliographic Details
Main Authors: Mamay, Sergius H., 1920-, Read, Charles Brian, 1907- (Author)
Format: Government Document Book
Language:English
Published: Washington : U.S. Govt. Print. Off, 1956.
Series:Professional paper (Geological Survey (U.S.)) ; 274-I.
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