J is for jack

January 1, 2010

The early days of drilling created a test of strength and endurance for miners.

Publication Year	2010
Title	J is for jack
Authors	W. H. Langer
Publication Type	Article
Publication Subtype	Journal Article
Series Title	Aggregates Manager
Index ID	70003330
Record Source	USGS Publications Warehouse
USGS Organization	Central Mineral and Environmental Resources Science Center

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