1973 Britannica Book of the Year 

 - Chicago :  Encyclopaedia Britannica,  1973 
 - 800 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Generalities 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>Encyclopedia 
<br/><br/><label>Dewey Class. No.: </label>031  / BRI-B