Columbia subject headings:
Arctic regions.
Nautilus (Submarine : SSN-571)
Harvard subject headings:
Princeton subject headings:
Anderson, William R., 1921-2007--Juvenile literature.
Discoveries in geography--American--Juvenile literature.
Nautilus (Submarine : SSN-571)--Juvenile literature.
North Pole--Discovery and exploration--American--Juvenile literature.
Underwater exploration--Arctic regions--Juvenile literature.
Underwater exploration--North Pole--Juvenile literature.
United States--Discovery and exploration--Juvenile literature.