History Sources 209 Regimental histories 160 Societies, etc 108 Taxation 98 Finance, Public 94 Indians of North America 77 more ... Economic conditions 76 Histoire 71 Militia 71 Politics and government 68 Pennsylvania Infantry 63 Social life and customs 56 Genealogy 53 Soldiers 46 Appropriations and expenditures 44 Biography 42 Germans 41 Description and travel 40 Pennsylvania Dutch 38 Railroads 38 Campaigns 35 Education 35 History, Local 35 Revolution 35 Quakers 34 African Americans 32 Registers 32 Registers of births, etc 32 Periodicals 26 Archives 25 Church history 25 Social conditions 25 Bibliography 23 Coal mines and mining 23 Society of Friends 23 Gettysburg, Battle of, Gettysburg, Pa., 1863 22 Personal narratives 22 Coal miners 21 Emigration and immigration 21 less ...