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You searched for: Creator Personal Names Eavenson, Howard N. (Howard Nicholas), 1873-1953. Remove constraint Creator Personal Names: Eavenson, Howard N. (Howard Nicholas), 1873-1953. All Creators Eavenson, Howard N. (Howard Nicholas), 1873-1953. Remove constraint All Creators: Eavenson, Howard N. (Howard Nicholas), 1873-1953.
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1. 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.
All:
Coal mines and mining--Pennsylvania--Pittsburgh.