Foyt, David C. <br/><br/>
The ZX81/TS1000 :  home computer book / 
David C. Foyt 
 - Berkeley :  McGraw-Hill,  1983 
 - 307 p.  ill. ;  24 cm. 
 - Macmillan computing books .
<br/><br/>Includes index Bibliography : p. 299 
<br/><br/><label>ISBN: </label>0881341061 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sinclair ZX81 (Computer)--Programming