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1by United States Department of the Interior Geological Survey; State of Minnesota, Iron Range Resources and Rehabilitation Commission“...Silica quadrangle topographic map (N4715-W9300/7.5) featuring handwritten notations by Ray Segar...”
Published 1952
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2by Canada. Department of Mines and Technical Surveys, Nicholson, N. L. (Norman Leon), Comtois, PaulGet access
Published 1955
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3by Glavnoe Upravlenie Navigat︠s︡ii i Okeanografii Ministerstva Oborony SSSR., Soviet Union. Voenno-Morskoĭ Flot., Gorshkov, Sergei Georgievich, Soviet Union. Voenno-Morskoĭ Flot“... and silica in water. Include legend and color coded list. 1974 - 1980. Three volumes produced by the USSR War...”
Published 1974
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4by Gorshkov, Sergei Georgievich, Soviet Union. Voenno-Morskoĭ Flot, Glavnoe Upravlenie Navigat︠s︡ii i Okeanografii Ministerstva Oborony SSSR.“..., Phosphates and silica in water. Include legend and color coded list. 1974 - 1980. Three volumes produced...”
Published 1977
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5by Gorshkov, Sergei Georgievich, Soviet Union. Voenno-Morskoĭ Flot, Glavnoe Upravlenie Navigat︠s︡ii i Okeanografii Ministerstva Oborony SSSR.“..., Phosphate, Silica Acid and PH value in water. Include legend and color coded list. 1974 - 1980. Three...”
Published 1980
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