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رمز / رقم الاستدعاء
[E/ECE/]COAL/GE.4/R.19/Add.9
العنوان
Report / transmitted by the Government of Czechoslovakia.
عناوين أخرى
Drivage, development and support of roadways and faces in deep mines - 1,000 metres and over - and consequently in more difficult mining, geological and atmospheric conditions : report
المؤلفون
معلومات عن جدول الأعمال
تاريخ
Geneva : UN, 21 Nov. 1983.
الوصف
7 p. : table