History 20,207 View Records Geology 13,956 View Records Politics and government 9,075 View Records Appropriations and expenditures 8,337 View Records Foreign relations 5,561 View Records Rules and practice 4,985 View Records Mines and mineral resources 4,755 View Records Management 4,458 View Records Officials and employees 4,221 View Records Computer science 4,166 View Records Geology, Stratigraphic 4,100 View Records Description and travel 3,729 View Records Economic conditions 3,393 View Records Groundwater 3,286 View Records Armed Forces 3,054 View Records Water quality 2,951 View Records Engineering 2,829 View Records Artificial intelligence 2,632 View Records Criticism and interpretation 2,590 View Records World politics 2,503 View Records Water-supply 2,481 View Records Social life and customs 2,403 View Records Economics 2,326 View Records Social conditions 2,179 View Records Medicine 2,165 View Records Health 1,980 View Records Evaluation 1,972 View Records Operas 1,910 View Records National security 1,907 View Records Science 1,880 View Records Mathematics 1,867 View Records Education 1,845 View Records Civilization 1,817 View Records Auditing 1,815 View Records Economic policy 1,739 View Records Computer security 1,727 View Records Foreign economic relations 1,695 View Records Antiquities 1,660 View Records Selection and appointment 1,652 View Records World War, 1939-1945 1,624 View Records Paleontology 1,552 View Records Forest management 1,514 View Records Land use, Rural 1,361 View Records Hydrology 1,359 View Records Software engineering 1,336 View Records Business 1,324 View Records Physics 1,313 View Records Computer networks 1,306 View Records Water Pollution 1,250 View Records Climatic changes 1,233 View Records Indians of North America 1,225 View Records Social sciences 1,178 View Records Stream measurements 1,175 View Records Land titles Registration and transfer 1,172 View Records Uranium ores 1,166 View Records Procurement 1,153 View Records Leadership 1,143 View Records Military policy 1,140 View Records Families 1,139 View Records Personnel management 1,129 View Records Environmental policy 1,128 View Records Life sciences 1,125 View Records Terrorism Prevention 1,119 View Records Budget 1,116 View Records Hydrogeology 1,111 View Records Emergency management 1,096 View Records Frontier and pioneer life 1,085 View Records Score 1,085 View Records Philosophy 1,082 View Records Geology, Structural 1,080 View Records Data mining 1,073 View Records Emigration and immigration 1,065 View Records Public lands 1,058 View Records Information technology 1,053 View Records Planning 1,044 View Records Aquifers 1,027 View Records Water resources development 1,017 View Records Water quality management 999 View Records Finance 994 View Records Psychology 976 View Records Sustainable development 971 View Records Computer networks Security measures 962 View Records Human-computer interaction 951 View Records Groundwater Pollution 941 View Records Race relations 934 View Records Database management 928 View Records Population 926 View Records Outdoor recreation 918 View Records National parks and reserves 917 View Records Human rights 895 View Records Environmental conditions 891 View Records Communication 890 View Records Conservation of natural resources 889 View Records Ethics 888 View Records Computational intelligence 887 View Records Religion 880 View Records Energy policy 877 View Records Criminal justice, Administration of 869 View Records World history 864 View Records Ore deposits 861 View Records