Columbia subject headings:
Harvard subject headings:
Andrée, Salomon August, 1854-1897.
Arctic regions--Aerial exploration.
Ballooning
Fraenkel, Knut (Knut Hjalmar Ferdinand), 1870-1897.
Hempleman-Adams, David, 1956-
North Pole--Aerial exploration.
North Pole--Description and travel.
Strindberg, Nils, 1872-1897.
Princeton subject headings:
Andrée, Salomon August, 1854-1897.
Arctic regions--Aerial exploration.
Ballooning.
Fraenkel, Knut (Knut Hjalmar Ferdinand), 1870-1897.
Hempleman-Adams, David, 1956-
North Pole--Aerial exploration.
North Pole--Description and travel.
Strindberg, Nils, 1872-1897.