Activities of the national mining research institutes of ECE countries and exchange of scientific, technical and economic information relating to the coal industry / transmitted by the Government of China.
1984
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رمز / رقم الاستدعاء
[E/ECE/]COAL/GE.4/R.21/Add.11
العنوان
Activities of the national mining research institutes of ECE countries and exchange of scientific, technical and economic information relating to the coal industry / transmitted by the Government of China.
المؤلفون
تاريخ
Geneva : UN, 30 May 1984.
الوصف
6 p. : chart