Columbia subject headings:
Harvard subject headings:
German language--Poland and Czech Republic--Silesia, Upper (Poland and Czech Republic)--20th century.
German language--Poland and Czech Republic--Silesia, Upper (Poland and Czech Republic)--Usage.
German language--Silesia, Upper (Poland and Czech Republic)--History--20th century.
German language--Silesia, Upper (Poland and Czech Republic)--Usage.
Germans--Poland and Czech Republic--Silesia, Upper (Poland and Czech Republic)--Interviews.
Germans--Silesia, Upper (Poland and Czech Republic)--Interviews.
Linguistic minorities--Poland and Czech Republic--Silesia, Upper (Poland and Czech Republic)--Biography.
Students--Poland and Czech Republic--Silesia, Upper (Poland and Czech Republic)--Interviews.
Students--Silesia, Upper (Poland and Czech Republic)--Interviews.
Uniwersytet Opolski. Instytut Filologii Germańskiej--Interviews.
Uniwersytet Opolski. Instytut Filologii Germańskiej.
Princeton subject headings:
German language--Silesia, Upper (Poland and Czech Republic)--20th century.
German language--Silesia, Upper (Poland and Czech Republic)--Usage.
Germans--Silesia, Upper (Poland and Czech Republic)--Interviews.
Interviews.
Silesia, Upper (Poland and Czech Republic)--Social life and customs.
Students--Silesia, Upper (Poland and Czech Republic)--Interviews.
Uniwersytet Opolski. Instytut Filologii Germańskiej--Interviews.