...
Hellmuth, Obata & Kassabaum
Location
State: MO; IL; DC; NY; CA; TX; AK
...
American Architects Directories:
Listing in 1962 American Architects Directory
Listing in 1970 American Architects Directory
Biographical/Historical directories:
Entry in Macmillan Encyclopedia of Architects (New York: Macmillan, 1982)