Charles, Joseph J. <br/><br/>
Timex/sinclair :  basic / 
Joseph J. Charles 
 - Hasbrouck Heighs, NJ. :  Hayden,  1983 
 - 182 p. :  ill. ;  22 cm. 
<br/><br/><label>ISBN: </label>0810421024 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Timex 1000--Programming<br/>Sinclair ZX81--Programming