American Cretaceous Ferns of the Genus Tempskya: Usgs Professional Paper 186-F by R. W. Brown, C. B. Read

American Cretaceous Ferns of the Genus Tempskya: Usgs Professional Paper 186-F

R. W. Brown, C. B. Read

50 pages missing pub info (editions)

nonfiction politics
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The United States Geological Survey (USGS) is a scientific organization created in 1879, and is part of the U.S. government. Their scientists explore our environment and ecosystems, to determine the natural dangers we are facing. The agency has ov...

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