Aha! Aha! insight /
Gardner, Martin,
Aha! Aha! insight / Martin Gardner ; [framed drawings by Jim Glen, diagrs. by Felix Cooper]. - New York : Scientific American, c1978. - viii, 179 p. : ill. ;
0894540017 9780894540011
Mathematical recreations.
Puzzles.
Problem solving.
QA95 / .G23
Aha! Aha! insight / Martin Gardner ; [framed drawings by Jim Glen, diagrs. by Felix Cooper]. - New York : Scientific American, c1978. - viii, 179 p. : ill. ;
0894540017 9780894540011
Mathematical recreations.
Puzzles.
Problem solving.
QA95 / .G23