Analyses of samples of delivered coal collected from July 1, 1915 to Jan. 1, 1922; with chapter on tidewater pool classifications.

Bibliographic Details

Corporate Author:	United States. Department of Commerce
Format:	Government Document eBook
Language:	English
Published:	[Washington] : GPO, 1923.
Series:	Mines Bur. Bull. No. 230
Subjects:	Classification. Coal mines and mining. Government purchasing. Quality control. Electronic books.
Online Access:	Connect to the full text of this electronic document