Columbia subject headings:
Automobile trailers--Law and legislation--United States.
Trailer camps--Law and legislation--United States.
Harvard subject headings:
Automobiles trailers--Law and legislation--United States.
Mobile home parks--Law and legislation--United States.
Mobile homes--Law and legislation--United States
Trailer camps--Law and legislation--United States.
Princeton subject headings:
Mobile home parks--Law and legislation--United States.
Mobile homes--Law and legislation--United States.