Columbia subject headings:
Harvard subject headings:
Coastal engineering--Netherlands--Katwijk aan Zee--History.
River engineering--Netherlands--Katwijk aan Zee--History.
Sluice gates--Netherlands--Katwijk aan Zee--History.
Princeton subject headings:
Coastal engineering--Netherlands--Katwijk aan Zee--History.
River engineering--Netherlands--Katwijk aan Zee--History.
Sluice gates--Netherlands--Katwijk aan Zee--History.