United States. Department of Commerce. (1923). Analyses of samples of delivered coal collected from July 1, 1915 to Jan. 1, 1922; with chapter on tidewater pool classifications. GPO.
Chicago Style (17th ed.) CitationUnited States. Department of Commerce. Analyses of Samples of Delivered Coal Collected from July 1, 1915 to Jan. 1, 1922; with Chapter on Tidewater Pool Classifications. [Washington]: GPO, 1923.
MLA (9th ed.) CitationUnited States. Department of Commerce. Analyses of Samples of Delivered Coal Collected from July 1, 1915 to Jan. 1, 1922; with Chapter on Tidewater Pool Classifications. GPO, 1923.
Warning: These citations may not always be 100% accurate.