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Ontwikkelingsatlas
1966
Persistent link: https://www.econbiz.de/10000115841
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Godišnik na Sofijskija Universitet Kliment Ochridski / Biologo-Geologo-Geografski Fakultet
Sofijski Universitet "Kliment Ochridski"; Sofijski … - Sofija : Izd. "Nauka i Izkustvo" - 47.1950/52(1953) - 57.1962/63(1964)
Persistent link: https://www.econbiz.de/10000359272
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Godišnik na Sofijskija Universitet Kliment Ochridski / Geologo-Geografski Fakultet / Geologija
Sofijski Universitet "Kliment Ochridski"; Sofijski … - Sofija : Nauka i Izkustvo - 57.1962/63(1964) - 80.1986(1991)
Persistent link: https://www.econbiz.de/10000368256
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Neft i gaz
Jovčev, Jovčo Sm.; Baluchovski, N. F. - 1961
Persistent link: https://www.econbiz.de/10000595581
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Geologische Karte der östlichen und zentralen Balkanhalbinsel
Bončev, Stefan (cartographer) - Geografski Institut <Sofia> - 1936
Persistent link: https://www.econbiz.de/10001647247
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Geologija na Bŭlgarija
Bončev, Ekim St. - 1960
Persistent link: https://www.econbiz.de/10002328186
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Stratigrafija na Bălgarija
Čankov, Vasil (contributor); Spasov, Christo (contributor) - 1968
Persistent link: https://www.econbiz.de/10002266985
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Geological map of the Union of South Africa
Südafrika / Department of Mines - 1955
Persistent link: https://www.econbiz.de/10001511480