United States. Bureau of Mines. (1941). Monthly petroleum statement 209, crude petroleum and petroleum products, March 1941. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Bureau of Mines. Monthly Petroleum Statement 209, Crude Petroleum and Petroleum Products, March 1941. [Washington]: [s.n.], 1941.
MLA (9th ed.) CitationUnited States. Bureau of Mines. Monthly Petroleum Statement 209, Crude Petroleum and Petroleum Products, March 1941. [s.n.], 1941.
Warning: These citations may not always be 100% accurate.