RUSSIAN BOOK UMNOV 1967 MODERN CHESS PROBLEMS VERY GOOD

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

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

Elements of the Theory of Functions and Functional Analysis

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

JOHN BEASLEY FANCY CHESS PROBLEMS 2000 CHESS SCHACH BILINGUAL BOOK

DUTCH BOOK EELJTE VISSERMAN'S CHESS PROBLEMS 1960 VERY GOOD

BULGARIAN BOOK KRIKOR HAYRABEDIAN CHESS PROBLEMS MINIATURES 1980