00812cam a22002531  4500001001300000003000400013005001700017008004100034010001700075035001900092040001900111042001200130050001600142110003200158245006000190260002300250300002300273500011500296650002700411650001700438650002400455710006200479999001700541l  51000030 DLC20260227111542.0800220s1951    sw            000 0 eng    al  51000030   a(OCoLC)6004120  aDLCcNBuUdDLC  apremarc00aTN803b.I732 aInternational Labour Office10aProductivity in coal mines.bThird item on the adgenda.  aGenevabn.p.c1951  avi, 177 p.c24 cm.  aAt head of title: Report 3. International Labour Organisation. Coal Mines Committee. 4th session, Geneva, 1951 0aCoal mines and mining. 0aCoal miners. 0aLabor productivity.2 aInternational Labour Organisation.bCoal Mines Committee.  c36727d36727