Columbia subject headings:
Architects and patrons--United States.
Architects--United States--Correspondence.
Wright, Frank Lloyd, 1867-1959--Correspondence.
Harvard subject headings:
Architects and patrons--United States.
Architects--United States--Correspondence.
Wright, Frank Lloyd, 1867-1959--Correspondence.
Princeton subject headings:
Architectural practice--United States--Correspondence.
Wright, Frank Lloyd, 1867-1959--Correspondence.