Columbia subject headings:
Harvard subject headings:
Aspherical lenses--History.
Businesspeople--Germany--Biography
Ernst Leitz (Firm)--Biography.
Leica Camera Gruppe--History.
Leica camera--History.
Leitz, Ernst, 1871-1956--Influence.
Leitz, Ernst, III, 1906-1979.
Photographic lenses--History.
Princeton subject headings:
35mm cameras--History--20th century.
Ernst Leitz (Firm)--History.
Leica camera--History--20th century.
Microscope industry--Germany--History.