United States. Bureau of Mines. (1937). Pebble-phosphate mine accident experience. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Bureau of Mines. Pebble-phosphate Mine Accident Experience. [Washington]: [s.n.], 1937.
MLA (9th ed.) CitationUnited States. Bureau of Mines. Pebble-phosphate Mine Accident Experience. [s.n.], 1937.
Warning: These citations may not always be 100% accurate.