Sipkov, Ivan Legal sources and bibliography of Bulgaria by Ivan Sipkov ; Vladimir Gsovski, general editor. - New York Published for Free Europe Committee by Praeger 1956. - 199 p. 22 cm. - Praeger publications in Russian history and world communism no. 18 . Previously classified under: KE 542 S61 LCCN: 57013220 Subjects--Topical Terms: Law--Sources.--BulgariaLaw--Bibliography.--Bulgaria LC Class. No.: KJM 47 / .S56 1956