Columbia subject headings:
Hölzlhuber, Franz, 1826-1898.
United States--Pictorial works.
Harvard subject headings:
Hölzlhuber, Franz.
United States--Pictorial works.
Princeton subject headings:
Aerial views.
Hölzlhuber, Franz, 1826-1898.
Hölzlhuber, Franz.
United States--Aerial views.
United States--Pictorial works.