Norman, Robin. <br/><br/>
ZX81 BASIC book / 
Robin Norman. 
 - 1st ed., North American ed. 
 - Indianapolis, Ind. :  H.W. Sams,  c1982. 
 - 187 p. :  ill. ;  22 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0672219573 (pbk.) :  $12.95 
<br/><br/><label>LCCN: </label>82050022  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sinclair ZX81 (Computer)--Programming.<br/>BASIC (Computer program language)
<br/><br/><label>LC Class. No.: </label>QA76.8.S625  / N67 1982 
<br/><br/><label>Dewey Class. No.: </label>510.78 Nor/Zx-e