Columbia subject headings:
Harvard subject headings:
Frith, Francis--Travel--Germany (West)
Frith, Francis--Travel--Rhine River Valley.
Germany (West)--Description and travel.
Germany (West)--Pictorial works.
Landscape photography--Germany (West)
Landscape photography--Rhine River Valley.
Rhine River Valley--Description and travel.
Rhine River Valley--Pictorial works.
Travel photography--Germany (West)
Travel photography--Rhine River Valley.
Princeton subject headings:
Rhine River Valley--Pictorial works.