186(J) - 1937 (Número de Professional Paper - United States Geological Survey)|
[número]
es un número de Professional Paper - United States Geological Survey / Washington : United States Geological Survey 
|
Contiene :
Additions to some fossil floras of the Western United States / Washington : United States Department of the Interior. Geological Survey (1937)
Additions to some fossil floras of the Western United States / Washington : United States Department of the Interior. Geological Survey (1937)
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