History 2,145 Sources 213 Regimental histories 161 Societies, etc 108 Taxation 100 Finance, Public 94 Indians of North America 82 more ... Politics and government 79 Economic conditions 78 Histoire 71 Militia 71 Pennsylvania Infantry 63 History, Local 62 Genealogy 60 Social life and customs 59 Soldiers 47 Biography 45 Appropriations and expenditures 44 Description and travel 44 Germans 44 Pennsylvania Dutch 42 Railroads 40 Quakers 36 African Americans 35 Campaigns 35 Education 35 Revolution 35 Registers 33 Registers of births, etc 33 Social conditions 30 Bibliography 29 Periodicals 28 Church history 26 Archives 25 Coal mines and mining 25 History, Military 25 Society of Friends 24 German Americans 22 Gettysburg, Battle of, Gettysburg, Pa., 1863 22 Personal narratives 22 less ...