00502cam a2200157 i 4500008004100000020001500041020001800056100002100074245009800095260004500193300002700238650003000265650001300295650002100308050001500329780620s1978    nyua     b    000 0 eng    a0894540017  a97808945400111 aGardner, Martin,10aAha! Aha! insight /cMartin Gardner ; [framed drawings by Jim Glen, diagrs. by Felix Cooper].  aNew York :bScientific American,cc1978.  aviii, 179 p. :bill. ; 0aMathematical recreations. 0aPuzzles. 0aProblem solving.00aQA95b.G23