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Manganese Ores
Curtis, A. H., (1919)
Cobalt Ores
Halse, Edward, (1924)
Gold Deposits of the world : With a section on prospecting
Emmons, William H., (1937)
Antimony ores
Halse, Edward, (1925)
Mercury ores : with map
Halse, Edward, (1923)
Cobalt ores : with a map