RUSSIAN BOOK UMNOV 1967 MODERN CHESS PROBLEMS VERY GOOD

BULGARIAN BOOK PETKO PETKOV SELECTED CHESS PROBLEMS 1982

POLISH BOOK MARIAN WROBEL ONE CENTURY OF POLISH CHESS PROBLEMS 1956

BULGARIAN BOOK KRIKOR HAYRABEDIAN CHESS PROBLEMS MINIATURES 1980

POLISH BOOK MARIAN WROBEL SECRETS of 2-MOVERS CHESS PROBLEMS 1953

DUTCH BOOK JAN HARTONG'S CHESS PROBLEMS 1946 VERY GOOD

DUTCH BOOK EELJTE VISSERMAN'S CHESS PROBLEMS 1960 VERY GOOD

DUTCH BOOK FREDERIK WILLEM NANNING'S CHESS PROBLEMS 1958 VERY GOOD