Primary Information Source(s):

PUMS Files:  Census of Population of Housing, 1980: Public-Use
	     Microdata Samples, (Michigan) [machine-readable
	     data file]/prepared by the Bureau of the Census.
	     -- Washington, 1983

Codebooks:   Census of Population and Housing, 1980:
	     Public-Use Microdata Samples Technical
	     Documentation/ prepared by the Data User Services
	     Division, Bureau of the Census. -- Washington:
	     The Bureau, 1983