by DOBREVA, EKATERINA D, ENCHEVA, MILKA A, PETROV, KHRISTO B
Year of Publication 16.10.1989

by DOBREVA, EKATERINA D, PINDEVA, LILIJA I, LIRKOV, ALEKSANDAR L, PETROV, KHRISTO B
Year of Publication 29.03.1996

by DOBREVA, EKATERINA D, ENCHEVA, MILKA A, LIRKOV, ALEKSANDAR L, TRENDAFILOV, ARKADIJ T, PETROV, KHRISTO B
Year of Publication 18.01.1994

by DOBREVA, EKATERINA D, PETROV, KHRISTO B, PETROVA-NIKOLOVA, MARIJA KH
Year of Publication 28.11.2003

by TRANDAFILOV,ARKADIJJ T, DOBREVA,EKATERINA D, ENCHEVA,MILKA A, LIRKOV,ALEKSANDR L, PETROV,KHRISTO B, PINDEVA,LILIJA I
Year of Publication 14.11.1986

by DOBREVA,EKATERINA D, PETROV,KHRISTO B
Year of Publication 15.10.1981

by DOBREVA,EKATERINA D, PETROV,KHRISTO B
Year of Publication 15.10.1981

by LIRKOV,ALEKSANDR L, ENCHEVA,MILKA A, DOBREVA,EKATERINA D, BOSHNAKOVA,RUMJANA N, PETROV,KHRISTO B, DINEV,PETR D, GANCHEVA,TAMARA S, GEORGIEVA,STEFKA D
Year of Publication 15.11.1985

by DOBREVA,EKATERINA D, ENCHEVA,MILKA A, TRENDAFILOV,ARKADIJJ T, LIRKOV,ALEKSANDR L, PETROV,KHRISTO B, PENEV,PENCHO G, PINDEVA,LILIJA I
Year of Publication 15.01.1985

by DOBREVA,EKATERINA D.,BG, ENCHEVA,MILKA A.,BG, PINDEVA,LILIJA I.,BG, PETROV,KHRISTO B.,BG, JANACHKOVA,IVANKA M.,BG
Year of Publication 15.12.1988

by PANUMIS,VACLOVAS V.,SU, ZHELIS,KHUGO P.,SU, DOBREVA,EKATERINA D.,BG, ENCHEVA,MILKA A.,BG, SHLEGERENE,ELENA A.,SU, PETROV,KHRISTO B.,BG
Year of Publication 15.11.1988

by DOBREVA, EKATERINA D, PINDEVA, LILIJA I, LIRKOV, ALEKSANDAR L, PETROV, KHRISTO B
Year of Publication 29.11.1996

by DOBREVA,EKATERINA D.,BG, KARADACHKI,IVAN S.,BG, GAVRILOVA,MARIANA L.,BG, BOSEVSKI,VALENTIN M.,BG, ENCHEVA,MILKA A.,BG, PETROV,KHRISTO B.,BG, KIREV,SIMEON I.,BG, RADEV,SIMEON G.,BG, LIRKOV,ALEKSAND'R L.,BG
Year of Publication 15.08.1988

by ENCHEVA,MILKA A, LIRKOV,ALEKSANDR L, PETROV,KHRISTO B
Year of Publication 12.12.1980

by ENCHEVA,MILKA A, DOBREVA,EKATERINA D, PETROV,KHRISTO B
Year of Publication 12.10.1979

by TRANDAFILOV,ARKADIJJ T, ENCHEVA,MILKA A, GAVRILOVA,MARIANA L, PETROV, KHRISTO B
Year of Publication 15.10.1982

by SHALKAUSKAS,MUDIS JJ, DOBREVA,EKATERINA D, LIRKOV,ALEKSANDR L, PETROV,KHRISTO B, VAJJKUTITE,ALDONA JU, ETCHEVA,MILKA A
Year of Publication 15.06.1981

by VACHEV ANGEL ATANASOV,BG, GEORGIEV GEORGI KHRISTOV,BG, TORBA VLADIMIR V,SU, STOJCHEV KHRISTO PETROV,BG, KUZNETSOV YURIJ N,SU, LESOV MIKHAIL STEFANOV,BG, KISHEV DIMAN PETROV,BG, STOYANOVA ILKA KOSTADINOVA,BG
Year of Publication 30.08.1985

by PETROV,KHRISTO T.,BG, RADOJJKOV,ASEN A.,BG, SERAFIMOV,BOZHIDAR L.,BG
Year of Publication 15.09.1988

by ATANAS GEORGIEV GEORGIEV,BG, KHRISTO PETROV DASKALOV,BG
Year of Publication 25.07.1978