EPOSIT OF USEFUL MINERAL SUBSTANCES - ECONOMIC RESOURCE AND FACTOR OF PRODUCTION.
| Autor: | Sorin-Iuliu, Mangu1 mangusorin@yahoo.com |
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| Zdroj: | Annals of the University of Petrosani Mining Engineering. 2021, Vol. 22, p135-141. 7p. |
| Databáze: | Academic Search Ultimate |
| Externí odkaz: |
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