Columbia subject headings:
Mathematics--Germany--Schleswig-Holstein--Textbooks--Catalogs.
Mathematics--Germany--Schleswig-Holstein--Textbooks--History.
Harvard subject headings:
Mathematics--Germany--Schleswig-Holstein--Textbooks--Catalogs.
Mathematics--Germany--Schleswig-Holstein--Textbooks--History.
Princeton subject headings:
Catalogs.
Mathematics--Germany--Schleswig-Holstein--Textbooks--Catalogs.
Mathematics--Germany--Schleswig-Holstein--Textbooks--History.
Textbooks.