Paleozoic origin of the cycads

Professional Paper 934
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Abstract

Publication type Report
Publication Subtype USGS Numbered Series
Title Paleozoic origin of the cycads
Series title Professional Paper
Series number 934
DOI 10.3133/pp934
Edition -
Year Published 1976
Language ENGLISH
Publisher U.S. Govt. Print. Off.,
Description 48 p.
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