Columbia subject headings:
Harvard subject headings:
Educational change--Germany--History--19th century--Handbooks, manuals, etc.
Educational change--Germany--History--20th century--Handbooks, manuals, etc.
Princeton subject headings:
Educational change--Germany--History--19th century--Handbooks, manuals, etc.
Educational change--Germany--History--20th century--Handbooks, manuals, etc.