Bulgaria. Central Council of the Trade Unions. Bulgaria Traditions, Sofia, 1971.
Bulgaria. Laws, Statutes, etc.
Constitution of the People's Republic of Bulgaria. Sofia: Sofia Press, 1971.
Bulgaria. State Information Office with the Council of Ministers. Statistical Pocket Book, 1970. Sofia: Sofia Press, 1970.
"Bulgaria," East Europe, XVII, No. 2, February 1968, 25-26.
"Bulgaria: History". Pages 385-400 in Encyclopaedia Britannica, IV. Chicago: William Benton, 1969.
"Bulgaria: Introductory Survey." Pages 570-588 in The Europa Yearbook, 1972,I. London: Europa Publications, 1972.
"Bulgarian Books Abroad," Bulgaria Today [Sofia], XVI, No. 10, October 1967, 10.
"Bulgarian Television," Bulgaria Today [Sofia], XV, No. 2, February 1966, 36-50.
"Bulgaria." Pages 41-50 in Moshe Sachs (ed.), Worldmark Encyclopedia of the Nations, V: Europe. New York: Harper and Row, 1967.