Author:

Ravn,R.L.

Year:

1981

Title:

Palynostratigraphy of Lower and Middle Pennsyl Vanian Coals of Iowa, with special reference to the Atokan-Desmoinesian boundary

Reference:

Ravn,R.L. (1981) Palynostratigraphy of Lower and Middle Pennsyl Vanian Coals of Iowa, with special reference to the Atokan-Desmoinesian boundary Geological Society of America, Abstracts with Program, Annual Meeting Vol. 13 # 6 P. 314- 314

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