Columbia subject headings:
Education, Secondary--Poland--History--19th century.
High schools--Curricula--Poland--History--19th century.
Polish language--Study and teaching (Secondary)--Poland--History--19th century.
Harvard subject headings:
Education, Secondary--Poland--History--19th century.
High schools--Poland--Curricula--History--19th century.
Polish language--Study and teaching (Secondary)--Poland--History--19th century.
Princeton subject headings: