Analyses of Samples of Delivered Coal Collected from July 1, 1915 to January 1, 1922, with a Chapter on the Tidewater Pool Classifications: Volumes 225-231

Analyses of Pennsylvania Bituminous Coals: Supplement to Technical Paper 590

Analyses of Samples of Delivered Coal: Collected from July 1, 1915 to January 1, 1922, with a Chapter on the Tidewater Pool Classifications, Issues 226-230

American Standard Safety Code for Installing and Using Electrical Equipment in and about Coal Mines (M2.1): Revision of American Standard Safety Rules for Installing and Using Electrical Equipment in Coal Mines, M2-1926, Issues 508-518