Bibliography 1,729 International relations 1,137 Budget 1,026 International trade 882 Administrative agencies 875 Chronology 792 Statistics 787 Pollution 762 Judge-made law 745 Research 689 Economic assistance 668 Law and legislation 650 Constitutional law 640 Armed Forces 628 History 579 Legislative histories 561 Tax incentives 536 Executive-legislative relations 512 Officials and employees 494 Arms control 485 Legal status, laws, etc 452 Federal government 444 Income tax 444 Taxation 427 Economic policy 426 Environmental law 419 Reorganization 417 Appropriations and expenditures 412 Federal aid 404 Business 393