Societies, etc History 170 Ethnic groups 150 Medicine 62 Periodicals 52 Irish Americans 42 Polish Americans 42 more ... Jews 33 German Americans 23 Religious life 15 Agriculture 14 Lithuanian Americans 12 Registers 12 Synagogues 12 Anniversaries, etc 11 Germans 10 Societies 10 Temperance 10 African Americans 9 Charities 9 Fraternal organizations 9 Anniversaries 8 Associations 8 Horticulture 8 Societies and clubs 8 Athletic clubs 7 Church societies 7 Dentistry 7 Political activity 7 Recreation 7 Choral societies 6 Directories 6 Greek Americans 6 Pennsylvania Dutch 6 Prevention 6 Slovak Americans 6 Social conditions 6 Social service 6 Tuberculosis 6 Veterans 6 less ...