World atlas of desertification

London ; New York, NY : Arnold Copublished in the US, Central and South America by John Wiley, 1997.
Umfang/Format: 1 atlas (x, 182 p.) : ill. (some col.), maps (some col.) ; 37 cm.

Environmental codes of conduct for tourism.

Technical report series (United Nations Environment Programme. Industry & Environment Office) no. 29
Paris : United Nations Environment Programme, Industry and Environment, 1995.
Umfang/Format: v, 69 p. : ill. ; 30 cm.