Polish Americans--Anniversaries, etc American Revolution Bicentennial, 1776-1976--Pennsylvania--Philadelphia 1 Polish American Citizens' League of Pennsylvania 1 Polish Americans--Monuments--Pennsylvania--Philadelphia 1 Polish Americans--Politics and government--20th century 1 Polish Heritage Society of Philadelphia 1 Polish National Committee 1 more ... Polish Relief Committee 1 War photography--Poland 1 World War, 1939-1945--Civilian relief--Poland 1 World War, 1939-1945--Photography 1 World War, 1939-1945--Poland 1 World War, 1939-1945--War work--United States 1 less ...