The Early history of the Pittsburgh Coal bed.

Creator Personal:
Eavenson, Howard N. (Howard Nicholas), 1873-1953.
Title:
The Early history of the Pittsburgh Coal bed.
Call Number:
P1798
Date:
1939
Description:
Journal article tearout from: West Pennsylvania historical magazine, v.22:no.3(1939:Sept.)
Subject Topical:
Coal mines and mining--Pennsylvania--Pittsburgh.