Subject retrieval in the seventies : new directions 
edited by Hans(Hanan) Wellisch and Thomas D Wilson 
 - Westport  Greemwood Publishing Company  1972 
 - viii, 180p. ;   24cm. 
<br/><br/><label>ISBN: </label>0837163226 
<br/><br/><label>Dewey Class. No.: </label>025.33 WEL