Explore Chicago Collections
https://explore.chicagocollections.org/records/?browse-cities=yes&f1-cities=Schaumburg&f2-cities=Elmhurst&f3-cities=Lemont&f4-types=Archival+Collections&f5-cities=Glendale+Heights&f6-cities=Winfield+%28IL%29&f7-cities=Naperville&f8-cities=Elk+Grove