Pittsburgh, Pa. Specification for construction, excluding mechanical equipment, of enlargement to power house in connection with experimental station for Bureau of Mines at Pittsburgh, Pa.
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Pittsburgh, Pa. Specification for construction, excluding mechanical equipment, of enlargement to power house in connection with experimental station for Bureau of Mines at Pittsburgh, Pa.
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Pittsburgh, Pa. Specification for construction, excluding mechanical equipment, of enlargement to power house in connection with experimental station for Bureau of Mines at Pittsburgh, Pa.