Smullyan, Raymond.
Lady or the tiger : and other logical puzzles / Rymond Smullyan. - Penguin Books 1982.
1709
Puzzles.
GV1493 / Smu.
Lady or the tiger : and other logical puzzles / Rymond Smullyan. - Penguin Books 1982.
1709
Puzzles.
GV1493 / Smu.