Marketing talc, pyrophyllite, and ground soapstone

Author:	Johnson, Bertrand Leroy.
Year:	1939
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7080
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	7080
Subjects:	Soapstone--Marketing
	Pyrophyllite--Marketing
	Silicates--Marketing
Link:	https://hdl.handle.net/2027/mdp.39015077570896