Columbia subject headings:
City planning--Data processing--Congresses.
Public administration--Data processing--Congresses.
Regional planning--Data processing--Congresses.
Harvard subject headings:
City planning--Data processing--Congresses.
Public administration--Data processing--Congresses
Regional planning--Data processing--Congresses.
Princeton subject headings:
Administrative agencies--Data processing--Congresses.
Information storage and retrieval systems--City planning--Congresses.
Public administration--Data processing--Congresses.