Gardner, Martin
Penrose tiles to trapdoor ciphers / Martin Gardner - New York : W. H. Freeman and company, 1988. - 311 p.
Index
Mathematical recreations
Triangle--Juvenile literature
793.74 G226P 1988
Penrose tiles to trapdoor ciphers / Martin Gardner - New York : W. H. Freeman and company, 1988. - 311 p.
Index
Mathematical recreations
Triangle--Juvenile literature
793.74 G226P 1988