Labor saving at limestone quarries

Author:	Bowles, Oliver,
Year:	1919
Document Type:	USBM
Issuing Agency:	Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.7:203
Series:	Mineral technology ;
Report Number:	24
Subjects:	Quarries and quarrying--Labor productivity--United States
	Limestone industry--Labor productivity--United States
Link:	https://hdl.handle.net/2027/mdp.39015077566076