Hartnell, Tim. <br/><br/>
Getting acquainted with your ZX81 / 
by Tim Hartnell. 
 - 3rd ed. 
 - Morris Plains, NJ :  Creative Computing Press,  cop. 1982. 
 - VI, [1], 120 s. :  il. ;  22 cm. 
<br/><br/> Na okł.: More than 80 programs.  Na okł.: Timex/Sinclair 1000 Compatible. 
<br/><br/><label>ISBN: </label>091668833X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Oprogramowanie.<br/>Sinclair ZX Spectrum (komputer).
<br/><br/><label>Universal Decimal Class. No.: </label>004.413