World tungsten production and location of mines : (estimated production 1942) / Board of Economic Welfare, Metals and Minerals.
- "Map no. 2065. 12 June, 1943." 2 insets: Portugal and Spain. Scale [ca. 1:5,000,000] 6 x 7 cm. -- Bolivia. Scale [ca. 1:5,000,000] 7 x 7 cm.
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