Paleozoic origin of the cycads

Sergius Harry Mamay

doi:10.3133/pp934

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Paleozoic origin of the cycads

Professional Paper 934

By: Sergius Harry Mamay

https://doi.org/10.3133/pp934

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Document: Report (pdf)
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Abstract

Suggested Citation

Mamay, S.H., 1976, Paleozoic origin of the cycads: U.S. Geological Survey Professional Paper 934, 48 p., https://doi.org/10.3133/pp934.

ISSN: 2330-7102 (online)

Additional publication details
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
Year Published	1976
Language	ENGLISH
Publisher	U.S. Govt. Print. Off.,
Description	48 p.