A skull breaker in a limestone quarry

Author:	Mosier, McHenry.
Year:	1948
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7472
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	7472
Subjects:	Stone and ore breakers
	Limestone--Fracture--Equipment and supplies
	Quarries and quarrying--Equipment and supplies
Link:	https://hdl.handle.net/2027/mdp.39015078463562