United States. Congress. House. Committee on Mines and Mining & ProQuest (Firm). (1940). Acquisition by Director of Geological Survey of certain collections for the United States. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Congress. House. Committee on Mines and Mining and ProQuest (Firm). Acquisition by Director of Geological Survey of Certain Collections for the United States. Washington: [publisher not identified], 1940.
MLA (9th ed.) CitationUnited States. Congress. House. Committee on Mines and Mining and ProQuest (Firm). Acquisition by Director of Geological Survey of Certain Collections for the United States. [publisher not identified], 1940.
Warning: These citations may not always be 100% accurate.