Penrose Tiles to Trapdoor Ciphers...and the Return of Dr. MatrixPenrose Tiles to Trapdoor Ciphers...and the Return of Dr. Matrix
Author: Gardner, Martin
W H Freeman & Co, 1989.
Near fine.
Stock number:
ISBN-13:
Author: Gardner, Martin
W H Freeman & Co, 1989.
Near fine.
Stock number:
U0716719878
ISBN-13:
9780716719878