Section A. Population and immigration. Census records ; Passenger arrivals and border crossings ; Naturalization records -- Section B. Military records. Records of the Regular Army ; Service record of volunteers ; Naval and Marine service records ; Pension records ; Bounty land warrant records ; Other records relating to military service -- Section C. Records relating to particular groups. Records of civilians during wartime ; Records of Native Americans ; Records of African Americans ; Records of Merchant seamen ; Records of civilian government employees -- Section D. Other useful records. Land records ; Claims records ; Records of the District of Columbia ; Miscellaneous records ; Cartographic records -- Appendix 1. List of record groups cited -- Appendix 2. List of microform publications cited.