00693cam a22002171  4500001001300000003000400013005001700017008004100034010001700075035001900092040005000111042001200161050002000173082001000193110003200203245013700235260001900372300002300391650004400414999001700458l  50000138 DLC20260227111542.0770629s1950    xx            000 0 eng c  al  50000138   a(OCoLC)3082935  aU. S. Dept. of Labor. LibrarycOCdOCoLCdDLC  apremarc00aHD7269.M615bI5  a622.82 aInternational Labour Office10aModel code of safety regulations for underground work in coal mines for the guidance of governments and of the coal-mining industry.  aGeneva,c1950.  aix, 102 p.c25 cm. 0aCoal mines and miningxSafety measures.  c36709d36709