National Industrial Conference Board, Voskuil, W. H., & White, A. G. (1931). The competitive position of coal in the United States. National industrial conference board, inc..
Chicago Style (17th ed.) CitationNational Industrial Conference Board, Walter H. Voskuil, and Alfred G. White. The Competitive Position of Coal in the United States. New York: National industrial conference board, inc., 1931.
MLA (8th ed.) CitationNational Industrial Conference Board, et al. The Competitive Position of Coal in the United States. National industrial conference board, inc., 1931.
Warning: These citations may not always be 100% accurate.