00588nam a2200193Ia 4500008004100000020001300041082001500054100002100069245003800090250000700128260003700135300002900172500000700201600003300208650002400241942000700265952010700272999001500379240925s9999    xx            000 0 und d  a76101986  a793.74 MAR  aMartin , Gardner 0aPenrose tiles to trapdoor ciphers  aNA  aNew York:bW. H. Freemanc,1989.  aviii,326p.bNAfOriginal  aNA  aHumanities & Natural Science  aArts and Recreation  cBK  001040708HUMaUITUbUITUd2000-04-03eNAl0o793.74 MARpQ3319r2024-09-25 07:13:06w2024-09-25yBK  c5818d5818