Permissible mine equipment approved during the calendar year 1947 : supplement to Information Circular 7432

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100 1 ⊔ ‡aHooker, A. B.
245 1 0 ‡aPermissible mine equipment approved during the calendar year 1947 : ‡bsupplement to Information Circular 7432 / ‡cby A B. Hooker.
260 ⊔ ⊔ ‡a[Washington, D.C.] : ‡bU.S. Dept. of the Interior, Bureau of Mines, ‡c1947.
300 ⊔ ⊔ ‡a5 p. ; ‡c27 cm.
336 ⊔ ⊔ ‡atext ‡btxt ‡2rdacontent
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490 0 ⊔ ‡aInformation circular / Bureau of Mines ; ‡v7465
538 ⊔ ⊔ ‡aMode of access: Internet.
650 ⊔ 0 ‡aMine safety. ‡0http://id.loc.gov/authorities/subjects/sh85085532
650 ⊔ 0 ‡aMining machinery. ‡0http://id.loc.gov/authorities/subjects/sh85085723
650 ⊔ 0 ‡aCoal mines and mining ‡xSafety measures. ‡0http://id.loc.gov/authorities/subjects/sh85027377
710 1 ⊔ ‡aUnited States. ‡bBureau of Mines. ‡0http://id.loc.gov/authorities/names/n79063444 ‡1http://id.loc.gov/rwo/agents/n79063444
772 0 0 ‡aHooker, A. B. ‡tPermissible mine equipment approved to January 1, 1947. ‡bRev. ed. ‡dWashington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, 1947 ‡w(OCoLC)41984427
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