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HISTORY POLITICS AND GOVERNMENT 45 LABOR UNIONS 15 SCIENCE 14 POLITICAL ACTIVITY 12 SCIENCE, ANCIENT 7 SOCIALISM 7 WORKING CLASS 7 ECONOMIC CONDITIONS 6 LABOR MOVEMENT 6 POLITICAL PARTIES 6 AGRICULTURE AND STATE 5 EDUCATION 5 HISTORIA 5 INTELLECTUAL LIFE 5 ARMED FORCES 4 COMMUNISM 4 MILITARY GOVERNMENT 4 SYNDICALISM 4 AGRICULTURAL LABORERS 3 CHURCH AND SOCIAL PROBLEMS 3 COLLEGE STUDENTS 3 GOVERNMENT POLICY 3 INDUSTRIAL POLICY 3 PERONISM 3 PETROLEUM INDUSTRY AND TRADE 3 RURAL CONDITIONS 3 SOCIAL CONDITIONS 3 WOMEN 3 CATHOLIC CHURCH 2