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The resemblance between the Lower Carboniferous cupules of Hydrasperma cf. tenuis Long and Sphenopteris bifida Lindley and Hutton
Long, Albert G.Volume:
70
Language:
english
Journal:
Transactions of the Royal Society of Edinburgh
DOI:
10.1017/s008045680001293x
Date:
January, 1979
File:
PDF, 10.65 MB
english, 1979