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1Published 1965### CRL customization ### ?> ### Add publisher and desc details ### ?>Sofi︠i︡a, Izd-vo na Bŭlgarskata akademi︠i︡a na naukite, 1965.227 p. : ill. ; 24 cm.
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2Published 1976### CRL customization ### ?> ### Add publisher and desc details ### ?>Sofi︠i︡a : Institut, 1976-v. : ill. ; 24 cm.
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3Published 1989### CRL customization ### ?> ### Add publisher and desc details ### ?>Sofia : The Archives, 1989.38 p. ; 20 cm.
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4Published 1990### CRL customization ### ?> ### Add publisher and desc details ### ?>Moskva : In-t so︠t︡siologii AN SSSR, 1990.49 p. ; 20 cm.
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5Published 1983### CRL customization ### ?> ### Add publisher and desc details ### ?>Novosibirsk : Akademi︠i︡a nauk SSSR, Sibirskoe otd-nie, In-t ėkonomiki i organiza︠t︡sii promyshlennogo proizvodstva, 1983.162 p. : ill. ; 20 cm.
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6Published 1978### CRL customization ### ?> ### Add publisher and desc details ### ?>Sofi︠i︡a : Bŭlgarska akademi︠i︡a na naukite, ︠T︡Sentralna biblioteka, 1978.167 p. ; 21 cm.
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7Published 1992### CRL customization ### ?> ### Add publisher and desc details ### ?>Moskva : In-t slav︠i︡anovedeni︠i︡a i balkanistiki RAN, 1992.128 p. ; 20 cm.
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8Published 1983### CRL customization ### ?> ### Add publisher and desc details ### ?>Moskva : Nauka, 1983.359 p. ; 21 cm.
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9Published 1977### CRL customization ### ?> ### Add publisher and desc details ### ?>Plovdiv : Plovdivski universitet "Paisiĭ Khilendarski", 1977.336 p. : ill. ; 22 cm.
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10Published 1987### CRL customization ### ?> ### Add publisher and desc details ### ?>Plovdiv : [s.n.], 1987.166 p. ; 22 cm.
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11Published 1984### CRL customization ### ?> ### Add publisher and desc details ### ?>Plovdiv : Plovdivski universitet "Paisiĭ Khilendarski", 1984.282 p. ; 21 cm.
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12Published 1985### CRL customization ### ?> ### Add publisher and desc details ### ?>Moskva : Vses. nauchno-issl. in-t sistemnykh issledovaniĭ, 1985.86 p. ; 26 cm.