Author:

Helfrich,C.T.;Hower,J.C.

Year:

1989

Title:

Palynologic and petrographic variation in the Otter Creek Coal Beds, (Stephanian, Upper Carboniferous), Western Kentucky.

Reference:

Helfrich,C.T. et al. (1989) Palynologic and petrographic variation in the Otter Creek Coal Beds, (Stephanian, Upper Carboniferous), Western Kentucky. Review of Palaeobotany and Palynology Vol. 61 # 1 P. 179- 189

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