RUSSIAN BOOK HERBSTMAN CHESS ENDGAME STUDIES 1964

RUSSIAN BOOK VLADIMIR BRON'S 90 CHESS PROBLEMS & 160 ENDGAME STUDIES 1969

BULGARIAN BOOK KRIKOR HAYRABEDIAN CHESS PROBLEMS MINIATURES 1980

RUSSIAN BOOK KUZNETSOV CHESS ENDGAME STUDIES 1980

BULGARIAN CHESS BOOK STEFAN SERGIEV POSTAL CHESS 1989 ECHECS SCHACH

RUSSIAN BOOK MELNITCHENKO 1989 CHESS : 2 SIDES OF CREATIVITY PROBLEMS & ENDGAME

RUSSIAN BOOK LEONID KUBBEL'S ENDGAME STUDIES 1984 VERY GOOD

BULGARIAN BOOK PETKO PETKOV SELECTED CHESS PROBLEMS 1982