Permissible mine equipment approved during the calendar year 1947 :
supplement to Information Circular 7432 /
by A B. Hooker.
APA Citation
Hooker, A. B., United States. Bureau of Mines. (1947). Permissible mine equipment approved during the calendar year 1947: supplement to Information Circular 7432. [Washington, D.C.]: U.S. Dept. of the Interior, Bureau of Mines.
MLA Citation
Hooker, A. B, and United States. Bureau of Mines. Permissible Mine Equipment Approved During the Calendar Year 1947: Supplement to Information Circular 7432. [Washington, D.C.]: U.S. Dept. of the Interior, Bureau of Mines, 1947.
Warning: These citations may not always be complete (especially for serials).