Strength of ore and top rock in the red iron-ore mines of the Birmingham district, Ala

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050 0 0 ‡aTN1 ‡b.U6 no. 379
086 0 ‡aC 22.5:379
100 1 ‡aCrane, Walter R. ‡q(Walter Richard), ‡d1870-
245 1 0 ‡aStrength of ore and top rock in the red iron-ore mines of the Birmingham district, Ala. / ‡cby W.R. Crane.
260 ‡aWashington, D.C. : ‡bU.S. Dept. of Commerce, Bureau of Mines : ‡bU.S. Govt. Print. Off., ‡c1926.
300 ‡aiii, 24 p. : ‡bill., tables. ; ‡c24 cm.
490 0 ‡aTechnical paper / United States Department of Commerce, Bureau of Mines ; ‡v379
504 ‡aIncludes bibliographic references.
538 ‡aMode of access: Internet.
650 0 ‡aIron ores ‡zAlabama.
740 0 ‡aTop rock, Birmingham district.
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