330 - Economics 83,517 查看记录 300 - Social sciences 47,200 查看记录 320 - Political science (Politics and government) 26,820 查看记录 340 - Law 21,139 查看记录 370 - Education 19,628 查看记录 360 - Social problems and services; associations 12,461 查看记录 380 - Commerce, communications, transportation 6,189 查看记录 350 - Public administration and military science 5,302 查看记录 390 - Customs, etiquette, folklore 4,873 查看记录 310 - Collections of general statistics 2,012 查看记录 070 - Documentary, educational, news media; journalism 30 查看记录 950 - History of Asia 10 查看记录 650 - Management and auxiliary services 4 查看记录 930 - History of ancient world to ca. 499 3 查看记录 130 - Parapsychology and occultism 2 查看记录 290 - Other religions 2 查看记录 620 - Engineering and allied operations 2 查看记录 800 - Literature (Belles-lettres) and rhetoric 2 查看记录 850 - Italian, Romanian & related literatures 2 查看记录 000 - Computer science, information, general works 1 查看记录 020 - Library and information sciences 1 查看记录 030 - General encyclopedic works 1 查看记录 190 - Modern western philosophy 1 查看记录 400 - Language 1 查看记录 510 - Mathematics 1 查看记录 570 - Biology 1 查看记录 660 - Chemical engineering 1 查看记录 780 - Music 1 查看记录 790 - Recreational and performing arts 1 查看记录 810 - American literature in English 1 查看记录 830 - Literatures of Germanic languages 1 查看记录 910 - Geography and travel 1 查看记录 960 - History of Africa 1 查看记录