Some coal-mine safety organizations in Pennsylvania bituminous field.

Bibliographic Details
Other Authors:	Currie, R. D. (Robert Dewey), 1898-
Format:	Government Document eBook
Language:	English
Published:	Washington, D.C. : [publisher not identified], 1931.
Series:	Mines Bur. Info. Circ. No. 6414
Subjects:	Mine safety > Pennsylvania. Electronic books.
Online Access:	Connect to the full text of this electronic document

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