Escape exit from Irene No. 2 Shaft : Ibex-Sunday area, Colorado / A.S. & R. Co., Salt Lake City, Utah ; S.E.Z. - June 1950. 1950.

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Escape exit from Irene No. 2 Shaft : Ibex-Sunday area, Colorado / A.S. & R. Co., Salt Lake City, Utah ; S.E.Z. - June 1950. 1950.

1 map : ms. ; on sheet 109 x 77 cm.

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American Smelting and Refining Company

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