Periodicals 6 Periodicals -- 3 Commerce -- 2 Industries -- 2 World politics -- 2 Business -- 1 Defense industries -- 1 more ... Defenses 1 Economic history -- 1 Economics -- 1 Finance -- 1 Foreign relations -- 1 International relations -- 1 Investments -- 1 Marine resources -- 1 Military training -- 1 Securities -- 1 Territorial waters -- 1 less ...