au.\*:("PASHOV P")
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ECONOMIC EFFECTIVITY DETERMINATION IN POLYMETAL OCCURRENCE MINING WORKS = DETERMINATION DE LA RENTABILITE DANS LES EXPLOITATIONS POLYMETALLIQUESPASHOV P; BOICHEV S; BOJCHEV S et al.1979; WORLD MINING CONGRESS. 10/1979/ISTANBUL; TUR; ANKARA: MADEN TETK. ARAMA ENST.; DA. 1979; VOL. 4; 10 P.Conference Paper
