1
by Anweiler, Oskar
Published 1974
Published 1974
Book
3
4
5
6
by Preobrazhensky, Evgenii A.
Published 1980
Published 1980
Book
7
9
Published 2007
Book
10
11
12
13
14
15
Published in Post-Soviet puzzles
(1995)
Book
17
Published in Post-Soviet puzzles
(1995)
Book
18
19
20