Statistical analysis of the progress in mechanical cleaning of bituminous coal from 1927 to 1934

Author:	Plein, Leopold Nicholas,
Year:	1936
Document Type:	BMEP
Issuing Agency:	U.S. Govt. Print. Off.,
SUDOC:	I 28.38:18
Series:	U.S. Bureau of Mines. Economic paper ;
Report Number:	18
Subjects:	Bituminous coal
	Coal preparation
Link:	https://hdl.handle.net/2027/mdp.39015077573668