Columbia subject headings:
Interstate agreements--Illinois--Rock Island County.
Interstate agreements--Iowa--Scott County.
Municipal services--Law and legislation--Illinois--Rock Island County.
Municipal services--Law and legislation--Iowa--Scott County.
Harvard subject headings:
Princeton subject headings:
Interstate agreements--Illinois--Rock Island County.
Interstate agreements--Iowa--Scott County.
Regional planning--Illinois--Rock Island County.
Regional planning--Iowa--Scott County.