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

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

The Stanford Mathematics Problem Book: With Hints and Solutions

RUSSIAN BOOK UMNOV 1967 MODERN CHESS PROBLEMS VERY GOOD

POLISH BOOK MARIAN WROBEL ONE CENTURY OF POLISH CHESS PROBLEMS 1956

VACLAV CISAR CHESS PROBLEMS 2002 ECHECS SCHACH

BULGARIAN BOOK PETKO PETKOV SELECTED CHESS PROBLEMS 1982

Werner SPECKMANN CHESS PROBLEMS MINIATUR 2-MOVERS 1965 ECHECS