Lake County Indiana resource

The occasional Region Roots blog from the Lake County Public Library in Merrillville points out an old but good index resource that was a 1938 doctoral thesis at the University of Chicago: "Sources & History for the History of Lake County, Indiana," by Minnie Margaret Ravenscroft. It's a cumulative index to 15 sources.

The thesis is not on line. And it's not in many physical libraries either. Besides Lake County, worldcat reveals that the following libraries hold copies: Hammond Public, University of Chicago, and the ever-reliable Allen County Public Library in Fort Wayne.