Author
Copernicus Society of America
1
Kusielewicz, Eugene
1
National Academy of Sciences (U.S.)
1
Polish National Alliance of the United States of North America
1
Polish Roman Catholic Union of America
1
Polish Union in the USA
1
Smithsonian Institution
1
U.S. National Commission for UNESCO
1
Union of Polish Women in America Glee Club
1
Wiewiora, Joseph
1