Columbia subject headings:
Clyde, Firth of, Region (Scotland)--Commerce.
Shipbuilding--Scotland--Clyde, Firth of--History.
Harvard subject headings:
Clyde, Firth of, Region (Scotland)--Commerce.
Shipbuilding--Scotland--Clyde, Firth of--History.
Princeton subject headings:
Clyde, First of, Region (Scotland)--Commerce.
Shipbuilding--Scotland--Clyde, Firth of--History.