"Muditing" in coal mines

Author:	Harrington, D.
Additional Authors:	Cash, F. E.
Year:	1929
Document Type:	MAIN
SUDOC:	C 22.11:6099
Series:	Information circular / Bureau of Mines ;
Report Number:	609
Subjects:	Coal mines and mining
	Mudite
Link:	https://hdl.handle.net/2027/mdp.39015095078310