Christ, John M <br/><br/>
Concepts and subject headings :  their relation in information retrieval and library science / 
by John M. Christ 
 - Metuchen, N.J. :  Scarecrow Press,  1972 
 - 174 p. ;  22 cm. 
<br/><br/>Bibliography : p. 172-174 
<br/><br/><label>ISBN: </label>0810804913 
<br/><br/><label>LCCN: </label>72-002093 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Subject headings--Social sciences<br/>Social sciences--Abstracting and indexing