Coal-derived humus :plant growth effects

Author:	Freeman, Philip G.
Additional Authors:	Fowkes, Walter W.
Year:	1968
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:7203
Series:	Report of investigations / Bureau of Mines ;
Report Number:	7203
Subjects:	Coal
	Humus--Testing
Link:	https://hdl.handle.net/2027/mdp.39015078537837