Map: Detroit Street Numbering
Map: Detroit United Railway Electric System 1920
New Numbering System Map of Detroit 1920
Map: Comparative Health Rating for Sections of Detroit 1920-1921
Map: Detroit New Urban Configuration 1920 – 2010
Map: Detroit Fire Insurance 1910s
Map: 1920s House Renumbering as Viewed by a Northender
Map: Detroit Election Commission 1920
Detroit Smallpox Map 1920
Map of Black Population, Detroit 1910-1950