Special precautions for multiple short-delay blasting in coal mines

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100 1 ⊔ ‡aNagy, John.
245 1 0 ‡aSpecial precautions for multiple short-delay blasting in coal mines / ‡cby John Nagy, Irving Hartmann and Robert W. Van Dolah.
260 ⊔ ⊔ ‡a[Washington, D.C.] : ‡bU.S. Dept. of the Interior, Bureau of Mines, ‡c1959.
300 ⊔ ⊔ ‡a8 p. : ‡bill. ; ‡c27 cm.
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490 0 ⊔ ‡aInformation circular / United States. Bureau of Mines ; ‡v7895
538 ⊔ ⊔ ‡aMode of access: Internet.
650 ⊔ 0 ‡aBlasting. ‡0http://id.loc.gov/authorities/subjects/sh85014797
650 ⊔ 0 ‡aCoal mines and mining ‡zUnited States ‡xExplosives ‡xSafety measures.
700 1 ⊔ ‡aVan Dolah, Robert W.
700 1 ⊔ ‡aHartmann, Irving.
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DAT 2 ⊔ ‡a2023-05-30T17:30:02Z
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