Penrose tiles to trapdoor ciphers ...& the return of dr.Matrix
Gardner, M
Penrose tiles to trapdoor ciphers ...& the return of dr.Matrix M. Gardner - New York W.H Freeman & Company 1989 - ix 311
0716719878
Penrose tiles to trapdoor ciphers ...& the return of dr.Matrix M. Gardner - New York W.H Freeman & Company 1989 - ix 311
0716719878