Author:

Walker,J.W.;Walker,A.G.

Year:

1984

Title:

Ultrastructure of Lower Cretaceous angiosperm pollen and the origin and Early evolution of Flowering plants

Reference:

Walker,J.W. et al. (1984) Ultrastructure of Lower Cretaceous angiosperm pollen and the origin and Early evolution of Flowering plants Annals of the Missouri Botanical Garden Vol. 72 # 2 P. 464- 521

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