Columbia subject headings:
Harvard subject headings:
Housing--United States--Statistics--Databases--Handbooks, manuals, etc.
United States--Census, 1990--Databases--Handbooks, manuals, etc.
United States--Population--Statistics--Databases--Handbooks, manuals, etc.
United States. Congress--Election districts--Statistics--Databases--Handbooks, manuals, etc.
Princeton subject headings:
Databases.
Housing--United States--Statistics--Databases--Handbooks, manuals, etc.
Statistics.
United States--Census, 21st, 1990--Databases--Handbooks, manuals, etc.
United States--Population--Statistics--Databases--Handbooks, manuals, etc.
United States. Congress--Election districts--Statistics--Databases--Handbooks, manuals, etc.