Carbonate petrology of the Ciprovci ore zone von DRAGOV, P, NEYKOV, H

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Polyelemental (with As, Sn, V, Bi, Ag, Te, Ge, Se, etc.) mineralizations in the Asarel porphyry copper deposit (Bulgaria) von PETRUNOV, R, DRAGOV, P, NEYKOV, H

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METHOD FOR PREPARING OF AMMONIUM- ALUMINIUM SULPHATE von VASILEV, KIRIL S, VASILEV, DIMITAR K, GEORGIEV, ALEKO N, DRAGOV, PLAMEN D, TIKLAROV, VASIL A, DIMITROV, DIMITAR G, BOZHILOV, SLAVEJKO P, URDZHANOV, KRASIMIR I

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METHOD AND DEVICE FOR CONTROLLING MACHINE OPERATION TIME IN DISTRIBUTED CONTROL SYSTEMS von DRAGOV,ZHIVKO M, KISOV,MIROSLAV P, IVANOV,PLAMEN V, STANKOV,STANISLAV N, KADEMOVA-KACAROVA,PETJA JJ, KACAROV,STEFAN A, PETROVA,RUMJANA ZH

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METHOD FOR PREPARING LEAD BURDEN FOR AGGLOMERATION von RALCHEV,PENCHO I, PARUSHEV,PARUSH G, DOBREV,NIKOLA I, GENEVSKI,VLADIMIR V, PALESHNIKOV,KHRISTO G, GEORGIEV,GEORGI T, SIDEROV,GEORGI KH, KORUDANOV,GEORGI N, GEORGIEV,NIKOLA A, CHALKOV,STOJAN V, ROSENOV,IVAN G, KHARALAMPIEV,GEORGI A, DRAGOV,ZHELO G, MIKHAJJLOV,NAJJDEN B, ILIEV,GEORGI R, SHOPOV,NIKOLA P

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