Columbia subject headings:
Harvard subject headings:
Genealogists--Germany--Biography.
Germany--History--1740-1806.
Hemmer, Johann Jakob, 1733-1790.
Linguists--Germany--Biography.
Meteorologists--Germany--Biography.
Physicists--Germany--Biography
Princeton subject headings:
Genealogists--Germany--Biography.
Germany--History--1740-1806.
Hemmer, Johann Jakob, 1733-1790.
Linguists--Germany--Biography.
Meteorologists--Germany--Biography.
Physicists--Germany--Biography.