Pennell, Andrew. <br/><br/>
The Sinclair QDOS companion :  a guide to the QL operating system / 
Andrew Pennell. 
 - London :  Sunshine,  1985. 
 - vii, 183 p. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0946408696 (pbk.)  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sinclair QL (Computer)--Programming.<br/>Operating systems (Computers).