How to Write Codes and Send Secret Messages /
Peterson, John, 1924-2002.
How to Write Codes and Send Secret Messages / by John Peterson; Illustrated by Bernice Myers. - New York : Scholastic INC., [1966]. - 64 p. : col. illus., 18 cm.
Explains how to write and decipher space codes, hidden word codes, and alphabet codes and gives formulas for invisible ink. Includes suggestions for delivering coded messages.
0590026062
Games end entertainment
Ciphers.--Juvenile literature.
How to Write Codes and Send Secret Messages / by John Peterson; Illustrated by Bernice Myers. - New York : Scholastic INC., [1966]. - 64 p. : col. illus., 18 cm.
Explains how to write and decipher space codes, hidden word codes, and alphabet codes and gives formulas for invisible ink. Includes suggestions for delivering coded messages.
0590026062
Games end entertainment
Ciphers.--Juvenile literature.