Analyses of Samples of Delivered Coal: Collected from July 1, 1915 to January 1, 1922, with a Chapter on the Tidewater Pool Classifications

Author:	Snyder, Ned H.
Year:	1923
Document Type:	N/A
Series:	United States Bureau of Mines Reports
Report Number:	Bulletin 230
Link:	https://digital.library.unt.edu/ark:/67531/metadc12413/