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191. Mine accidents. Accidents and employment at nonmetallic-mineral mines in United States during calendar year 1939.

Corporate/Agency Authors:: Mines Bureau and Interior Department
Publisher:: Mines Bureau
Date:: [1940.]
SuDoc number:: I 28.26:284

192. Quarries and quarrying. Employment and accidents at quarries and related plants in United States during 1939.

Corporate/Agency Authors:: Mines Bureau and Interior Department
Publisher:: Mines Bureau
Date:: [1940.]
SuDoc number:: I 28.26:283

193. Coal mines and mining. Employment and accidents at coal mines in United States, 1937; [by L. E. Geyer and M. G. Parry].

Corporate/Agency Authors:: Mines Bureau and Interior Department
Publisher:: Mines Bureau
Date:: [Nov. 22, 1939.]
SuDoc number:: I 28.26:268

194. Metal mines. Accidents and employment at metal mines and nonmetal mines in United States, 1937; [by M. E. Kolhos and M. B. Jones].

Corporate/Agency Authors:: Mines Bureau and Interior Department
Publisher:: Mines Bureau
Date:: Nov. 15, 1939
SuDoc number:: I 28.26:267

195. Quarries and quarrying. Employment and accidents at quarries and related v plants in United States, 1938; [by V. E. Wrenn and L. S. Horton].

Corporate/Agency Authors:: Mines Bureau and Interior Department
Publisher:: Mines Bureau
Date:: Nov. 10, 1939
SuDoc number:: I 28.26:266

196. Sand and gravel producers' safety contest, 1938; [by T. D. Lawrence and C. T. Herring].

Corporate/Agency Authors:: Mines Bureau and Interior Department
Publisher:: Mines Bureau
Date:: July 19, 1939
SuDoc number:: I 28.26:265

197. Safety of life. National Crushed Stone Association safety competition of 1938: [by T. D. Lawrence and E. E. Getzin].

Corporate/Agency Authors:: Mines Bureau and Interior Department
Publisher:: Mines Bureau
Date:: July 14, 1939
SuDoc number:: I 28.26:264

198. Copper. Employment and accidents at copper mines in United States, 1938; [by M. E. Kolhos and M. B. Jones].

Corporate/Agency Authors:: Mines Bureau and Interior Department
Publisher:: Mines Bureau
Date:: July 6, 1939
SuDoc number:: I 28.26:263

199. Iron mines and mining. Employment and accidents at iron-ore mines in United States, 1938; [by E. E. Getzin].

Corporate/Agency Authors:: Mines Bureau and Interior Department
Publisher:: Mines Bureau
Date:: June 28, 1939
SuDoc number:: I 28.26:262

200. National lime association safety contest of 1938; [by T. D. Lawrence and E. E. Getzin].

Corporate/Agency Authors:: Mines Bureau and Interior Department
Publisher:: Mines Bureau
Date:: May 24, 1939
SuDoc number:: I 28.26:261

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