Columbia subject headings:
Asia--Description and travel.
Ethiopia--Description and travel.
Galapagos Islands--Description and travel.
Voyages and travels.
Harvard subject headings:
Asia--Description and travel
Ethiopia--Description and travel.
Galapagos Islands--Description and travel
Voyages and travels
Princeton subject headings:
Asia--Description and travel.
Ethiopia--Description and travel.
Galapagos Islands--Description and travel.
Voyages and travels.