The Stanford Mathematics Problem Book: With Hints and Solutions

PAROS SOVIET CHESS STUDIES and PROBLEMS TOURNAMENT 1948-1950 ECHECS SCHACH

RUSSIAN BOOK UMNOV 1967 MODERN CHESS PROBLEMS VERY GOOD

2 POLISH BOOKLETS CHESS PROBLEMS & STUDIES JAN RUSINEK & ROSOLAS 1986

BULGARIAN BOOK PETKO PETKOV SELECTED CHESS PROBLEMS 1982

BULGARIAN BOOK KRIKOR HAYRABEDIAN CHESS PROBLEMS MINIATURES 1980

VACLAV CISAR CHESS PROBLEMS 2002 ECHECS SCHACH

VLADIMIR NABOKOV POEMES & PROBLEMES POEMS & PROBLEMS 1999 CHESS SCHACH ECHECS