Columbia subject headings:
Hoffmann, Karl, 1823-1859.
Natural history--Costa Rica.
Naturalists--Costa Rica--Biography.
Naturalists--Germany--Biography.
Harvard subject headings:
Hoffmann, Karl, 1823-1859.
Hoffmann, Karl.
Natural history--Costa Rica
Naturalists--Costa Rica--Biography.
Naturalists--Germany--Biography.
Princeton subject headings: