Chalk, whiting, and whiting substitutes

Author:	Bowles, Oliver,
Year:	1931
Document Type:	USBI
Issuing Agency:	U.S. Dept. of Commerce, Bureau of Mines,
SUDOC:	C 22.11:6482
Series:	Information circular / Bureau of Mines ;
Report Number:	6482
Subject:	Chalk
Links:	https://hdl.handle.net/2027/mdp.39015095085950
	https://hdl.handle.net/2027/mdp.39015074128060