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American Fern Society
William R. Maxon, Charles S. Lewis, R. C. Benedict, E. J. Winslow, C. A. Weatherby and Frederick Wm. KobbéVolume:
20
Language:
english
Journal:
American Fern Journal
DOI:
10.2307/1544663
Date:
April, 1930
File:
PDF, 633 KB
english, 1930