A practical guide to timetabling 
/by Roger Simper 
 - London:  Ward lock educational,  1980. 
 - 147 p. :  ill. ;  21 cm. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0706240642 
<br/><br/><label>Dewey Class. No.: </label>371.2424  / SIM