Author
Polish American Labor Council
2
Polish Roman Catholic Union of America
2
Polish Socialist Alliance
2
Polish Workmen's Aid Fund
2
Fontes, Manuel da Costa
1
Kowalik, Jan
1
Multicultural History Society of Ontario
1
Polish National Alliance of the United States of North America
1
Teutsch, Maria
1
University of Minnesota. Immigration History Research Center
1
Wepsiec, Jan, 1909-
1
Zgoda
1