Columbia subject headings:
Andes--Description and travel.
Ecuador--Description and travel.
Mountaineering--Ecuador, Western.
Mountains--Ecuador.
Whymper, Edward, 1840-1911--Travel--Ecuador, Western.
Harvard subject headings:
Andes Region--Description and travel.
Ecuador--Description and travel.
Mountaineering--Ecuador.
Whymper, Edward, 1840-1911--Travel.
Princeton subject headings: