john harrison. <br/><br/>
Secretarial duties.  [Book /] 
john harrison. 
 - 9th ed. 
 - London :  Pitman,  1992. 
 - 332 p. :  ill ;  21 cm. 
<br/><br/><label>ISBN: </label>0273038281 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Title.<br/> communication systems .
<br/><br/><label>Dewey Class. No.: </label>657.2 
<br/><br/><label>National Library of Medicine Call No.: </label> / H.J