1. 1
    Published 1992
    ...United Nations,...
    Conference Proceeding Book
  2. 2
    Published 2000
    ...The United Nations University Press,...
    Book
  3. 3
    Published 2002
    ...Earthscan, for the United Nations Environment Programme,...
    Book
  4. 4
    Published 2007
    ...United Nations Environment Programme ; Stationery Office [distributor],...
    Connect to electronic version
    Book
  5. 5
    Published 1997
    ...United Nations Environment Programme ; Oxford University Press [distributor],...
    Book