Columbia subject headings:
Decentralization in government--Congresses.
Diffusion of innovations--Congresses.
Regional planning--Congresses.
Space in economics--Congresses.
Harvard subject headings:
Decentralization in government--Congresses.
Diffusion of innovations--Congresses.
Regional planning--Congresses.
Space in economics--Congresses
Princeton subject headings:
Decentralization in government--Congresses.
Diffusion of innovations--Congresses.
Regional planning--Congresses.
Space in economics--Congresses.