Coal paleobotany

Author:	Thiessen, Reinhardt,
Additional Authors:	Sprunk, George C,
Year:	1941
Document Type:	USBM
Issuing Agency:	U.S. Govt. print. off., Bureau of Mines,
SUDOC:	I 28.7:631
Series:	Technical paper / United States. Bureau of Mines ;
Report Number:	631
Subjects:	Coal
	Paleobotany--Carboniferous
Links:	https://hdl.handle.net/2027/mdp.39015078485854
	https://hdl.handle.net/2027/mdp.39015095081553