Novel method of ventilating Pennsylvania coal mine.

Bibliographic Details

Corporate Author:	Crucible Fuel Co
Other Authors:	Owings, C. W. (Clarence Watson), 1894-
Format:	Government Document eBook
Language:	English
Published:	Washington, D.C. : [publisher not identified], 1931.
Series:	Mines Bur. Rpt. of Investigation No. 3127
Subjects:	Gas. Ventilation. Electronic books.
Online Access:	Connect to the full text of this electronic document