Columbia subject headings:
Architectural libraries--Directories.
Architecture--Library resources--Illinois--Chicago--Directories.
Architecture--Research--Illinois--Chicago--Directories.
Libraries--Illinois--Chicago--Directories.
Libraries--Illinois--Cook County--Directories.
Harvard subject headings:
Architectural libraries--Directories.
Architecture--Archival resources--Directories.
Architecture--Illinois--Chicago
Architecture--Illinois--Chicago Region--Directories.
Architecture--Research--Directories.
Architecture--United States--History--Sources.
Libraries--Illinois--Chicago--Directories.
Libraries--Illinois--Cook County--Directories.
Princeton subject headings:
Architectural libraries--Directories.
Architecture--Illinois--Cook County--Directories.
Libraries--Illinois--Chicago--Directories.
Libraries--Illinois--Cook County--Directories.