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1[Sofi︠i︡a, Bulgaria : Ministerstvo na gorite i gorskata promishlenost]“...Bulgaria. Ministerstvo na gorite i gorskata promishlenost...”
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2Published 1975### CRL customization ### ?> ### Add publisher and desc details ### ?>[Sofi︠i︡a : s.n.], 1975-v. : ill. ; 27 cm.“...Bulgaria. Ministerstvo na gorite i gorskata promishlenost...”