Relief shown by shading and spot heights. Depths shown by shading, landform drawings, and soundings.
"Supplement to the National Geographic, December 1981, page 780A, vol. 160, no. 6--The World."
Published: Washington--December 1981.
Includes notes.
Political map of "The World" at scale 1:39,370,000 on verso.
Insets on verso: North polar region -- South polar region -- Language groups -- Religions -- Population density -- Time zones.