Primary Information Source(s):

   Census '90 Basics.  U. S. Department of Commerce. 
	     Bureau of the Census.
	     Available via Data User Services Division, Bureau of the
	     Census, Washington DC, Telephone  (301) 763-2074.

   Census of Population and Housing, 1990: Public Use Microdata
             Sample U. S. Technical Documentation.  
	     Washington D.C.: Bureau of the Census, 1992.

   Social Sciences Data Base (SSDB)
   Electronic newsletter, datafiles and 
   bibliographic references,
   University of California at San Diego (Connect)

   Inter-university Consortium for Political and 
   Social Research:  Archival of datafiles and 
   supporting documentation (Connect)

	Campbell, Carmen.  
	1990 Census Public Use Microdata Samples (PUMS).
	ICPSR Bulletin, XIII (February 1993):  1-4, 9,10.