American Lignites: Geological Occurrence, Petrographic Composition, And Extractable Waxes

Author:	Selvig, W. A.
Additional Authors:	Parks, B. C., Ode, W. H.
Year:	1950
Document Type:	N/A
Series:	United States Bureau of Mines Reports
Report Number:	Bulletin 482
Link:	https://digital.library.unt.edu/ark:/67531/metadc12640/