Improvement of reliability of opencast mining techniques in difficult geological, mining and climatic conditions / transmitted by the United Kingdom Government.
1983
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رمز / رقم الاستدعاء
[E/ECE/]COAL/GE.4/R.20/Add.5
العنوان
Improvement of reliability of opencast mining techniques in difficult geological, mining and climatic conditions / transmitted by the United Kingdom Government.
المؤلفون
تاريخ
Geneva : UN, 30 Nov. 1983.
الوصف
8 p.