Campbell, Malcolm. <br/><br/>
Manual of Business Library Practice /  

 - 1st ed /  
 - London W11 :   Clive Bingley Ltd. ,   1967 
 - p.186 :  
<br/><br/><label>ISBN: </label>0-208-01359-8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library Science
<br/><br/><label>Dewey Class. No.: </label>0.150694444444444  / L5