Author:

Schabilion,J.T.;Brotzman,N.C.

Year:

1979

Title:

A tetrahedral megaspore arrangement in a seed fern ovule of Pennsylvanian age.

Reference:

Schabilion,J.T. et al. (1979) A tetrahedral megaspore arrangement in a seed fern ovule of Pennsylvanian age. American Journal of Botany Vol. 66 # 6 P. 744- 745

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