Codes for kids

Explains and illustrates twenty-nine codes which can be used to send secret messages or as brainteasers.

A. Whitman
1976
9780807512395
book

Holdings

hidmidmiidnidwidlocation_codelocationbarcodecallnumdeweycreatedupdated
300411364645222407197784293311PCE301PCC0000002001.54 Alb1.5416377825731736800991