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The American Institute of Architects Archives
Membership file contains membership application, correspondence about dues, notification of death. The membership file for his father, {+} Charles Zeller Klauder, includes a letter from Charles Z. Klauder, Jr., notifying the AIA of his father's death, and a notice of the reorganization of the office under the name The Office of Charles Z. Klauder, Jr+ (https://aiahistoricaldirectory.atlassian.net/wiki/spaces/AHDAA/pages/36943523/ahd1024171,%20includes%20a%20letter%20from%20Charles%20Z.%20Klauder,%20Jr.,%20notifying%20the%20AIA%20of%20his%20father's%20death,%20and%20a%20notice%20of%20the%20reorganization%20of%20the%20office%20under%20the%20name%20The%20Office%20of%20Charles%20Z.%20Klauder,%20Jr).