Marine resources -- Congresses 7 Oceanography -- 4 Congresses -- 3 Military relations -- 3 Research -- 3 Sea-power -- 3 more ... Fisheries -- 2 Foreign economic relations -- 2 Government policy 2 Government policy -- 2 Management -- 2 Ocean engineering -- 2 Periodicals 2 Shipping -- 2 Strategic aspects -- 2 Aquaculture -- 1 Archipelagoes -- 1 Continental shelf -- 1 Economic aspects 1 Economic aspects -- 1 Food chains (Ecology) -- 1 International cooperation -- 1 Law of the sea -- 1 Marine biology -- 1 Marine ecology -- 1 Marine pollution -- 1 Marine productivity -- 1 Marine resource -- 1 Marine resources conservation 1 less ...