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1959. Powell, Susan and Navarro, Fernando. This point dataset represents the general locations of mineral deposits in Mongolia in 1959. Minerals included are: gold, iron ore, lead, salt, flu... UC Berkeley Library.
1943. Powell, Susan and Navarro, Fernando. This point dataset represents the major mineral deposits in and near Mongolia in 1943. The features were described on the source map as "Mineral de... UC Berkeley Library.