The cultural development of Bulgaria
Foreign Language Press, 1959
 Buku Teks
Popov, Kostadin, author
Cultural policy in Bulgaria
Unesco Press, 1981
 Buku Teks
R. Vassilev
Sociology in Bulgaria
Publishing House of the Bulgaria, 1970
 Buku Teks
Konstitusi Bulgaria
editor, S. Prajudi Atmosudirdjo ...[et al.]
Ghalia Indonesia, 1987
 Buku Teks
Sudjatmoko
Economic development as a cultural promblem / Sudjatmoko
Cornell University, 958
 Buku Teks
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