by VALTSCHEV A.J, NINOV E
Year of Publication 31.08.1984

by VALCHEV A, NINOV E
Year of Publication 30.09.1978

by VALCHEV A, NINOV E
Year of Publication 27.03.1974

by NINOV E, VALTSCHEV A
Year of Publication 10.09.1974

by NINOV E,BG, VALTSCHEV A,BG
Year of Publication 16.09.1974

by VELEV V, VALCHEV A, KTESTENYAKOV Y, VISOKOMOGILSKI G, PEEV V, NINOV E
Year of Publication 21.08.1976

by VELEV V, VISSOKOMOGILSKI G, PEEV V, KRESTENJAKOV J, NINOV E, VALTSCHEV A
Year of Publication 10.12.1975

by VELEV V T, KRESTENJAKOV J I, VALTSCHEV A J; NINOV E P, VISSOKOMOGILSKI G A, PEEV V G
Year of Publication 02.06.1975

by KOYCHEV T Y, KRESTENYAKOV Y I, GENEV I V, VALCHEV A Y, PARASHKEVOV H N, NINOV E P, NENOV B N, PEEV V G, LYUBENOV H K, DERSARKISYAN A M
Year of Publication 13.01.1979

by KOJTSCHEV T J, KRESTENJAKOV J I, GENEV I V, NINOV E P, LJUBENOV H K, PARASCHKEVOV H N, DERSARKISJAN A M, NENOV B N, VALTSCHEV A J, PEEV V G
Year of Publication 13.08.1976

by KOJTSCHEV T J, KRESTENJAKOV J I, GENEV I V, NINOV E P, LJUBENOV H K, PARASCHKEVOV H N, DERSARKISJAN A M, NENOV B N, VALTSCHEV A J, PEEV V G
Year of Publication 13.08.1976

by KRESTENYAKOV Y,BG, NINOV E,BG, PEEV V,BG, VELEV V,BG, VALCHEV A,BG, VISOKOMOGILSKI G,BG
Year of Publication 10.09.1974

by V. G. PEEV, A. I. VALTSCHEV, E. P. NINOV, T. J. KOJTSCHEV, J
Year of Publication 10.09.1976

by G A VISSOKOMOGILSKI, J I KRESTENJAKOV, E P NINOV, V T VELEV, V G PEEV, A J VALTSCHEV
Year of Publication 28.10.1985

by K I KRESTENJAKOV, A M DERSARKISJAN, T J KOLTSCHEV, B N NENOV, H N PARASCHKEVOV, H K LJUBENOV, I V GENEV, E P NINOV, V G PEEV, A J VALTSCHEV
Year of Publication 01.08.1983

by DIMITER ILIEV STILYANOV, KRUM YANKOV DJIVANOV, RUMYANA VLADIMIROVA GORANOVA, KIRIL YORDANOV TRIFONOV, TZVETAN ZAHARIEV BACHEV, BORIS IVANOV STANIMIROV, ASSEN TODOROV NAYDENOV, VANGEL NIKOLOV TZVETKOV, ATANAS PETROV LALOV ET GANCHO NACHEV NINOV
Year of Publication 18.07.1980