Columbia subject headings:
Merchant marine--Peru--Congresses.
Shipping--Congresses.
Shipping--Peru--Congresses.
Harvard subject headings:
Marine resources--Congresses
Merchant marine--Peru--Congresses.
Shipping--Peru--Congresses.
Princeton subject headings:
Marine resources--Congresses.
Merchant marine--Peru--Congresses.
Shipping--Peru--Congresses.