by SLAVOVA,STOJANKA I, ZIKOLOVA,SVETLANA S, JANEVA,ILIJANA D, STOJJCHEVA,DUSHKA S, IVANOVA,MARIJA N
Year of Publication 15.01.1987

by STANEVA,MAJA R, ATANASOVA,VIOLETA L, LAZAROVA,ATANASKA D, DASKALOV,PLAMEN M, JANKOV,JANKO M, KHRISTOVA,CVETA KH, ILIEVA,ELI A, IVANOVA,MARIJA N
Year of Publication 15.10.1987

by IVANOV,LJUBEN S, TODOROV,JJORDAN K, IVANOVA,MARIJA N
Year of Publication 15.04.1982

by KHUBENOV,GEORGI N, DIMITROV,DIMITR S, IVANOVA,MARIJA N
Year of Publication 12.11.1979

by SLAVOVA,STOJANKA I, SBEVA,ADRIANA K, BARAKOVA,LILIJA V, ZIKOLOVA,SVETLANA S, IVANOVA,MARIJA N
Year of Publication 15.10.1982

by ATANASOVA,VIOLETA L, STOJANOVA,ELENA.I, MUTAFCZI.ISKI,LJUBOMIR.I, GEORGIEV,ATANAS V, ILIEVA,ELI A, IVANOVA,MARIJA N, CHRISTOVA,.SVETA C
Year of Publication 15.06.1978