Columbia subject headings:
Linde Aktiengesellschaft--History.
Refrigeration and refrigerating machinery--Germany--History.
Refrigerator industry--Germany--History.
Harvard subject headings:
Engineering firms--Germany--History.
Linde Aktiengesellschaft--History.
Linde, Carl, 1842-1934.
Refrigeration and refrigerating machinery--Germany--History--19th century.
Princeton subject headings:
Engineering firms--Germany--History.
Linde Aktiengesellschaft--History.