Author:

Helfrich,C.T.

Year:

1981

Title:

Preliminary correlation of Coals of the Princess Reserve District in eastern Kentucky. (In: Coal and Coal-bearing rocks of eastern Kentucky)

Reference:

Helfrich,C.T. (1981) Preliminary correlation of Coals of the Princess Reserve District in eastern Kentucky. (In: Coal and Coal-bearing rocks of eastern Kentucky) Geological Society of America, Annual Coal Division Field Trip P. 106- 119

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