Notes on precautions to be taken when drilling oil or gas wells through workable coal beds or through mine workings

Author:	Herbert, Charles Arthur,
Year:	1929
Document Type:	USBI
Issuing Agency:	U.S. Dept. of Commerce, Bureau of Mines,
SUDOC:	C 22.11:6195
Series:	Information circular / United States Department of Commerce, Bureau of Mines ;
Report Number:	6195
Subjects:	Mining engineering
	Oil wel drilling
	Gas well drilling
Link:	https://hdl.handle.net/2027/mdp.39015077584194