by KOMITOV,PETR G, SJAROVA,ANTOANETA D, KIRCHEVA,RADKA S, GROZEVA,ELENA I, PETKOV,LAZAR I
Year of Publication 15.04.1984

by NIKOLOV,KIRIL V, KIRCHEVA,RADKA S, MARKOVA,TANJA N, PETKOV,LAZAR I, GRZEVA,ELENA I
Year of Publication 15.03.1984

by FILIZOVA,LJUDMILA D, KIROV,GEORGI N, KIRCHEVA,RADKA S, CHOPARINOV,CHAVDAR G, GROZEVA,ELENA I, PETKOV,LAZAR I
Year of Publication 16.07.1985

by MIKHAJJLOV,DIMO G, KIRCHEVA,RADKA S, GRIGOROV,GRIGOR R, ATANASOV,KRASIMIR M, DENEVA,TEMENUZHKA D, PETKOV,LAZAR I
Year of Publication 15.01.1985

by MAKHOVA,LILJANA D, MIKHAJJLOV,DIMO G, KIRCHEVA,RADKA S, ATANASOV,KRASIMIR M, DENEVA,TEMENUZHKA D, PETKOV,LAZAR I
Year of Publication 15.02.1984

by MAKHOVA,LILJANA D, MIKHAJJLOV,DIMO G, MARINOVA,ELENA S, KIRCHEVA,RADKA S, MARKOVA,TANJA N, GRIGOROV,GRIGOR R, DENEVA,TEMENUZHKA D, PETKOV,LAZAR I, MARAZOVA,ISKRA R
Year of Publication 15.04.1987

by NIKOLOVA, ZLATKA G, MIKHAJLOV, DIMO G, GRUDOVA, VESELINA S, DENEVA, TEMENUZHKA D, BOSTANDZHIEV, DIMITAR R, BAJLOV, PANAJOT K, KIRCHEVA, RADKA S, AVRAMOVA, VASILKA I, GRIGOROV, GRIGOR R, SIPSEV, ROSEN D, ATANASOVA, PENKA B, GEORGIEV, GEORGI JA
Year of Publication 15.05.1991

by MAKHOVA,LILJANA D, MIKHAJJLOV,DIMO G, KIRCHEVA,RADKA S, MARKOVA,TANJA N, GRIGOROV,GRIGOR R, DENEVA,TEMENUZHKA D, GROZEVA,ELENA I, PETKOV,LAZAR I, MARAZOVA,ISKRA R, STOJANOVA,JANKA G
Year of Publication 15.04.1987