State laws relating to coal-mine timbering /
J.W. Paul and J.N. Geyer.
APA Citation
Paul, J. W. (James Washington)., Geyer, J. Nicholas. (1928). State laws relating to coal-mine timbering. Washington, D.C.: U.S. Dept. of the Interior, Bureau of Mines.
MLA Citation
Paul, J. W. (James Washington), and John Nicholas Geyer. State Laws Relating to Coal-mine Timbering. Washington, D.C.: U.S. Dept. of the Interior, Bureau of Mines, 1928.
Warning: These citations may not always be complete (especially for serials).