Elrod, J. McRee. <br/><br/>
Classification / 
by J. McRee Elrod. 
 - 2d ed. 
 - Metuchen, N.J. :  Scarecrow Press,  1978. 
 - viii, 79 p. :  ill. ;  22 cm. 
 - Modern library practices series ;   no. 3. .
<br/><br/> 69006. 
<br/><br/><label>ISBN: </label>0810810948 
<br/><br/><label>LCCN: </label>77017282 //r80 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Classification, Dewey decimal--Programmed instruction.<br/>Classification, Library of Congress--Programmed instruction.