Other
Emigration and immigration
History
5
Social conditions
4
Immigrants
3
Ethnic relations
2
Émigration et immigration
2
Histoire
2
Migrations
2
Puerto Ricans
2
Américains d'origine allemande
1
Communauté
1
Community life
1
Conditions sociales
1
Economic conditions
1
Employees
1
German Americans
1
Jews
1
Jews, East European
1
Labor and laboring classes
1
Labor unions
1
Philadelphia (Pa.)
1
Political refugees
1
Portoricains
1
Puerto Rico
1