These maps have been scanned, georeferenced, and digitized.
Call number: G4104.C6 1933 .U5
Location: Map Collection (Room 370), Regenstein Library, the University of Chicago.
Link: http://pi.lib.uchicago.edu/1001/cat/bib/7368097
By sector and zones in Chicago.
Published 1935.
Prepared by Richard O. Lang.
Social Science Research Committee at the University of Chicago.