Andreassen, Karl <br/><br/>
Cryptology and the personal computer with programming in basic /  
Karl Andreassen 
 - USA  Aegean Park Press  1986 
 - 157 p 
<br/><br/>The Art of Encoding and Decoding (Page-9), The Art of Encoding and Decoding (Page-15), The Magic Matrix (Page-28), Letter Frequency Distribution (Page-41), Scrambled Alphabets (Page-55), The Electronic Slate (Page-65), Color Cryptology (Page-74), Colorful Cryptology (Page-84), Colorful  Cryptology (Page-95), Colorful Cryptology (Page-102), Colorful Cryptology (Page-107), Colorful Cryptology (Page-113), Colorful Cryptology (Page-123), Colorful Cryptology (Page-130). 
<br/><br/><label>ISSN: </label>0894121456 
<br/><br/><label>Dewey Class. No.: </label>005.82,AND