Columbia subject headings:
Chemical carriers (Tankers)--Congresses.
Chemicals--Transportation--Safety measures--Congresses.
Marine pollution--Congresses.
Ocean engineering--Congresses.
Rope--Congresses.
Harvard subject headings:
Princeton subject headings:
Chemical carriers--Congresses.
Chemicals--Transportation--Safety measures--Congresses.
Marine pollution--Congresses.
Ocean engineering--Congresses.
Rope--Congresses.