Columbia subject headings:
Harvard subject headings:
Firearms--Germany--History--19th century.
Firearms--Germany--History--20th century.
Germany. Heer--Firearms--History--19th century.
Germany. Heer--Firearms--History--20th century.
Mauser 98 rifle--Germany--History.
Mauser 98 rifle--History.
Mauser rifle--History.
Rifles--Germany--History.
Princeton subject headings:
Firearms--Germany--History--19th century.
Firearms--Germany--History--20th century.
Germany. Heer--Firearms--History--19th century.
Germany. Heer--Firearms--History--20th century.