دورية
Planning of a New Surface Mine-Western Coal
| العنوان: | Planning of a New Surface Mine-Western Coal |
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| المؤلفون: | Graham, Robert J. |
| المصدر: | Mining Congress Journal; Jun1977, Vol. 63 Issue 6, p42, 0p |
| قاعدة البيانات: | Supplemental Index |
| تدمد: | 00265160 |
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