References
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- Berkmuller , K. 1992 . Environmental education about the rain forest , Gland , , Switzerland : IUCN and The World Conservation Union .
- MacKinnon , J. , MacKinnon , K. , Child , G. and Thorsell , J. 1986 . Managing protected areas in the tropics , Gland , , Switzerland : IUCN .
- McNeely , J. A. , ed. 1992 . Parks for life , Gland , , Switzerland : IUCN .