Columbia subject headings:
Harvard subject headings:
Irrigation canals and flumes--France--Toulon--History.
Toulon (France)--Economic conditions.
Toulon (France)--History
Water mills--France--Toulon--History.
Water-supply--France--Toulon--History.
Princeton subject headings:
Canals--France--Toulon--History.
Toulon (France)--Description and travel.
Water mills--France--Toulon--History.