A few more links about Johnstown history of interest to researchers.

Library of Congress images — The LOC has an enormous collection of Johnstown-related images, including flood photography, maps, plans and much more.
Historic American Buildings Survey/Historic American Engineering Record/Historic American Landscapes Survey records — The HABS, HAER, and HALS Surveys provide wonderful information on Johnstown neighborhoods and historically significant structures within them. The Library of Congress has digitized hundreds of photographs and documents that were part of these projects.

America’s Industrial Heritage publications about Southwestern Pennsylvania: Completed in the late 80s and early 90s, these books about a nine-county region of Southwestern Pennsylvania were a project of the National Park Service. Digitized copies can be accessed at the link above. Of particular interest to JAHA and our audiences is “The Character of a Steel Mill City: Four Historic Neighborhoods of Johnstown, PA,” which gives a wonderful overview of Johnstown, Downtown, Cambria City/Minersville, and Westmont; and “Historic Resource Study: Cambria Iron Company.” Great information about Windber can be found in “A Legacy of Coal: The Coal Company Towns of Southwestern PA.”
Cambria County Historical Society — The CCHS site provides information about the society’s mission and services.
Sanborn Fire Insurance maps — These maps were developed by the Sanborn Insurance Company to assess fire risk in various neighborhoods in Johnstown. They are among the best pre- and post-flood maps of Johnstown (available maps are dated 1886, 1891, 1895, and 1913), and have been digitized by Penn State University.
Southmont Centennial website — This website was developed by Nadine Carr of JAHA to celebrate the 2019 centennial of Southmont, one of Johnstown’s historic neighborhoods.