Penrose Tiles to Trapdoor Ciphers (Paperback) → Hardcover ISBN-13: 9780716719878 ISBN-10: 0716719878 Genres: Science & Math, Humor & Entertainment ? |
Penrose Tiles to Trapdoor Ciphers (Paperback) → Hardcover ISBN-13: 9780716719878 ISBN-10: 0716719878 Genres: Science & Math, Humor & Entertainment ? |