Vietnam War, 1961-1975 350 History 303 Foreign relations 201 Politics and government 153 Diplomatic relations 135 HISTORY 65 Foreign economic relations 55 Missing in action 53 Refugees 43 General 42 SOCIAL SCIENCE 41 Histoire 40 Prisoners and prisons, North Vietnamese 38 Economic assistance, American 35 Economic conditions 33 Social conditions 33 Vietnamese 29 Emigration and immigration 28 Vietnamese Americans 27 Travel 25 Social aspects 24 Communism 23 Human rights 23 Indochinese War, 1946-1954 23 Military assistance, American 23 Prisoners of war 23 POLITICAL SCIENCE 22 Social life and customs 22 International relations 20 Women 20