Bull, Gordon M. <br/><br/>
Time-sharing systems / 
by G. M. Bull and S. F. G. Packham. 
 - London :  McGraw-Hill,  1971. 
 - x, 139 p. :  ill. ;  24 cm. 
<br/><br/>Bibliography: p. 136-138. 
<br/><br/><label>ISBN: </label>0070941610 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Time--sharing computer systems.