Author:

Hall,J.W.

Year:

1971

Title:

A spore with Cytoplasm-like contents from the Cretaceous of Minnesota, USA.

Reference:

Hall,J.W. (1971) A spore with Cytoplasm-like contents from the Cretaceous of Minnesota, USA. Pollen et Spores Vol. 13 # 1 P. 163- 168

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