Technical progress in mechanization of roadway drivage in coal and stone ; increase in the share of roadways driven by heading machines / transmitted by the Government of the Federal Republic of Germany.
1983
تفصيلات التسجيلة (السجل)
رمز / رقم الاستدعاء[E/ECE/]COAL/GE.1/R.50/Add.3/Rev.1
العنوانTechnical progress in mechanization of roadway drivage in coal and stone ; increase in the share of roadways driven by heading machines / transmitted by the Government of the Federal Republic of Germany.
المؤلفونGermany, Federal Republic of
تاريخGeneva : UN, 7 Dec. 1983.
الوصف
4, 8 p. : ill., graphs