Methane in California gold mines /
by Byron O. Pickard and E.D. Gardner.
APA Citation
Pickard, B. O., Gardner, E. D. (Eugene Delos)., United States. Bureau of Mines. (1921). Methane in California gold mines. Washington, D.C.: U.S. Dept. of the Interior, Bureau of Mines.
MLA Citation
Pickard, Byron O., 1882-, E. D. (Eugene Delos) Gardner, and United States. Bureau of Mines. Methane In California Gold Mines. Washington, D.C.: U.S. Dept. of the Interior, Bureau of Mines, 1921.
Warning: These citations may not always be complete (especially for serials).