United States. Bureau of Mines & ProQuest (Firm). (1969). Minerals Yearbook 1967. Volume IV area reports: International prepared by staff of the Bureau of Mines. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Bureau of Mines and ProQuest (Firm). Minerals Yearbook 1967. Volume IV Area Reports: International Prepared by Staff of the Bureau of Mines. Washington: [publisher not identified], 1969.
MLA (9th ed.) CitationUnited States. Bureau of Mines and ProQuest (Firm). Minerals Yearbook 1967. Volume IV Area Reports: International Prepared by Staff of the Bureau of Mines. [publisher not identified], 1969.
Warning: These citations may not always be 100% accurate.