Current population survey  March 1989, 1990, 1991  annual demographic files.  [computer file] 

 - Washington  Bureau of the Census  1991. 
 - 1 computer laser optical disk  12 cm. 
<br/><br/> Disk Characteristics: CD-ROM 
<br/><br/><label>LCCN: </label>doc92000550  
<br/><br/><label>Subjects--Topical Terms: </label><br/>CD-ROM Fed. Doc.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>United States--Population--Databases.