Waasdorp & Northrup
Rochester, NY
Charles V. Northrup
Leonard Adrian Waasdorp
William G. Kaelber
Waasdorp, Northrup & Kaelber (firm)
Northrup, Kaelber & Kopf (firm)
The American Institute of Architects Archives
Architects Roster questionnaire, 1953, contains information about the firm and its key personnel.