Columbia subject headings:
Africa, North--Description and travel.
Holmboe, Knud, 1902-1931.
Libya--Description and travel.
Harvard subject headings:
Africa, North--Description and travel.
Holmboe, Knud. 1902-1931--Journeys--Libya.
Libya--Description and travel.
Libyan Desert--Description and travel.
Princeton subject headings:
Africa, North--Description and travel.
Holmboe, Knud, 1902-1931.
Libya--Description and travel.