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HISTORY 11,315 HISTORIA 10,290 EDUCACI�ON 6,008 GENERAL 5,977 EDUCATION 5,792 CIENCIAS SOCIALES 3,912 HISTORY AND CRITICISM 3,840 PHILOSOPHY 3,825 DERECHO 3,612 FILOSOF�IA 3,604 SOCIAL ASPECTS 2,872 RESEARCH 2,553 PUBLICACIONES PERI�ODICAS 2,503 POLITICS AND GOVERNMENT 2,447 SCIENCE 2,440 PSICOLOG�IA 2,437 STUDY AND TEACHING 2,431 TECNOLOG�IA 2,336 LITERATURA 2,271 MEDICINA 2,264 TECHNOLOGY 2,233 SOCIAL SCIENCE 2,193 PERIODICALS 2,148 ASPECTOS SOCIALES 2,125 PSYCHOLOGY 2,080 AGRICULTURA 2,066 LAW 2,063 HISTORIA Y CR�ITICA 2,055 EDUCACI�ON SUPERIOR 2,012 SOCIAL CONDITIONS 1,960