Mining and geological knowledge during the Neolithic: a geological study on the variscite mines at Gavà, Catalonia von Camprubí, Antoni, Melgarejo, Joan-Carles, Proenza, Joaquín A., Costa, Fidel, Bosch, Josep, Estrada, Alícia, Borell, Ferran, Yushkin, Nikolai P., Andreichev, Valentin L.

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Timing of Igralishte pluton in Ograzhden Mountain, SW Bulgaria: implications for the tectono-magmatic evolution of the region von Peytcheva, Irena, von Quadt, Albrecht, Tarassov, Michail, Zidarov, Nikola, Tarassova, Eugenia, Andreichev, Valentin

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Petrology, geochemistry and age dating of Skrut granitoids – new evidence for Early Triassic magmatism in Belasitsa Mountain (SW Bulgaria) von Zidarov, Nikola, Tarassova, Eugenia, Peytcheva, Irena, Albrecht, von Quadt, Andreichev, Valentin, Titorenkova, Rositsa

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MAGNETIC SYSTEM OF ARRANGEMENT FOR CLEANING LIQUIDS FROM GASES AND FERROMAGNETIC INCLUSIONS AND MAGNETIC TREATMENT OF AQUEOUS SYSTEMS von BARMIN VALENTIN V,SU, ANDREICHEV SERGEJ P,SU, ANDREICHEV PAVEL P,SU, LAZOVSKIJ FEDOR A,SU

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