01573cam a2200349I 4500005979204MiAaHDL20250726000000.0m d cr bn ---auaua740813s1974 dcu f000 0 eng d(MiU)990059792040106381sdr-miu.990059792040106381(MiU)MIU01000000000000005979204-goog(OCoLC)977111(MiU)Aleph005979204UDIUDILHLDRBUtOrBLWUSBITN295.U4 no.8644I 28.27:8644Pittsburgh Mining and Safety Research Center (U.S.)http://id.loc.gov/authorities/names/n79131081http://id.loc.gov/rwo/agents/n79131081Bureau of Mines, Pittsburgh Mining and Safety Research Center research and development activities :fiscal year 1971 /by Staff, Pittsburgh Mining and Safety Research Center.[Washington, D.C.] :U.S. Dept. of the Interior, Bureau of Mines,1974.25 p. ;26 cm.texttxtrdacontentcomputercrdamediaonline resourcecrrdacarrierInformation circular / United States Department of the Interior, Bureau of Mines ;8644Mode of access: Internet.Explosives.http://id.loc.gov/authorities/subjects/sh85046474Coal mines and miningSafety measures.http://id.loc.gov/authorities/subjects/sh85027377Mine safety.http://id.loc.gov/authorities/subjects/sh850855323901507851607000597920420241218070724.020250726000000.020260306165531.02026-03-07T10:01:00Z2026-03-01T18:30:03ZSDR-MIUmiuALMAprepare.pl-004-009BKsdr-miu.990059792040106381MiUSDRGWLA005979204mdp.39015078516070MIU990059792040106381MIUGWLA20260307googlemdp.390150785160701974pdbibUS fed doc