U. S. Department of Commerce <br/><br/>
Statistical abstract of the United States 1991 

 - Washington  The National Data Book  1991 
 - 986 
<br/><br/><label>Subjects--Topical Terms: </label><br/>United States - Statistics
<br/><br/><label>LC Class. No.: </label>C 317.73 Un3s 1991