Architectural History
AIA Guide to the Twin Cities by Larry MilletAmerican Institute of Architects Guide to the Twin Cities by Larry Millet

Cass Gilbert Resources

AIA Guide to the Twin Cities by Larry Millett, Minnesota Historical Society Press, 2007.

"Notes on 189 Works by Cass Gilbert in Minnesota", Research by Charles Locks and Tom Blanck funded by grants from the Patrick Aimee Butler Foundation and the University of Minnesota, 2003-2005. Nine PDFs available for download:

Minnesota Historical Society Visual Resources Database
"Cass Gilbert" search