01355cam a2200313Ia 4500005889358MiAaHDL20250726000000.0m d cr bn ---auaua990629s1957 dcua f000 0 eng d(MiU)990058893580106381sdr-miu.990058893580106381(MiU)MIU01000000000000005889358-goog(OCoLC)41627567(MiU)Aleph005889358QPCQPCLHLWEAUSBMIUtOrBLWn-us---USBII 28.27:7810United States.Bureau of Mines.http://id.loc.gov/authorities/names/n79063444http://id.loc.gov/rwo/agents/n79063444Recommended safety standards for shaft sinking :1957 /[staff of the Bureau of Mines].[Washington, D.C.] :U.S. Dept. of the Interior, Bureau of Mines,1957.21 p. :ill. ;27 cm.texttxtrdacontentunmediatednrdamediavolumencrdacarrierInformation circular / United States. Bureau of Mines ;7810Mode of access: Internet.Coal mines and miningSafety measuresStandardsUnited States.Shaft sinkingSafety measuresStandardsUnited States.3901507845985900588935820241218054325.020250726000000.020260308165301.02026-03-09T10:31:02Z2024-12-24T18:30:02ZSDR-MIUmiuALMAprepare.pl-004-009BKsdr-miu.990058893580106381MiUSDRGWLA005889358mdp.39015078459859MIU990058893580106381MIUGWLA20260309googlemdp.390150784598591957pdbibUS fed doc