Sand-and-gravel safety contest of 1931

Author:	Adams, William W.
Year:	1932
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of Commerce, Bureau of Mines,
SUDOC:	C 22.12:3186
Series:	Report of investigations / United States Department of Commerce, Bureau of Mines ;
Report Number:	3186
Subjects:	Industrial safety
	Sand and gravel mines and mining--Accidents
	Sand and gravel industry--Accidents
Link:	https://hdl.handle.net/2027/mdp.39015077562885