Mason, Adrienne.

Lu & Clancy's secret codes / Lu and Clancy's secret codes written by Adrienne Mason ; illustrated by Pat Cupples. - Toronto : Kids Can Press, c1999. - 40 p. : col. ill. ; 26 cm. - Lu & Clancy .

ISBN: 1550745530 : $5.95

Subjects--Topical Terms:
Cryptography.
Ciphers.

Dewey Class. No.: j652.8