Map of the World Distribution of arid regions; Explanatory note.
Map of the World Distribution of arid regions; Explanatory note.
- París : UNESCO, 1977.
- 54 p. : il., map.
- MAB technical notes ; 7 .
9231014846
551.45 (252) =20 CAR No.7.
9231014846
551.45 (252) =20 CAR No.7.