Politics and government 210 Vietnam War, 1961-1975 166 History 152 Foreign relations 104 Protest movements 88 Underground press publications 74 Vietnamese Conflict, 1961-1975 74 Civil rights 67 World politics 61 Political activists 60 Counterculture 49 Student movements 33 Social conditions 29 Economic conditions 27 History and criticism 25 Race relations 25 Political activity 23 Radicalism 23 Philosophy 17 Peace movements 16 War poetry, American 14 African Americans 13 Criticism and interpretation 13 Influence 13 Cold War 12 Literature and the war 12 Social aspects 12 Social movements 12 American literature 11 Political aspects 11