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The Identity of Archaeopteris and Callixylon

Charles B. Beck
Brittonia
Vol. 12, No. 4 (Oct. 15, 1960), pp. 351-368
Published by: Springer on behalf of the New York Botanical Garden Press
Stable URL: http://www.jstor.org/stable/2805124
Page Count: 18
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The Identity of Archaeopteris and Callixylon
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