Purchasing an encyclopedia    12 points to consider 

 - Chicago  A L A       1979 
 - 38p  cm. 
<br/><br/><label>Standard No.: </label>6,612 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>LIBRARY SCIENCE
<br/><br/><label>Dewey Class. No.: </label>2;47:1, L9 (2D)