Questions and answers on timbering bituminous coal mines /
by J.W. Paul.
APA Citation
Paul, J. W. (James Washington)., United States. Bureau of Mines. (1928). Questions and answers on timbering bituminous coal mines. Washington, D.C.: U.S. Govt. Print. Off..
MLA Citation
Paul, J. W. (James Washington), and United States. Bureau of Mines. Questions And Answers On Timbering Bituminous Coal Mines. Washington, D.C.: U.S. Govt. Print. Off., 1928.
Warning: These citations may not always be complete (especially for serials).