1. Thesaurus for Graphic Materials 
2. ZOE's Thesaurus, National Wildlife Health Center
3. Wildland Planning Glossary, USFS
4. Environmental Subject Descriptor, National Planning Commission/IUCN
5. National Conservation Strategy Implementation Programme
6. Macrothesaurus for Information Processing in the Field of Economic and
7. Social Development, United Nations Organization for Economic
Co-operation and Development
8. UNBIS Thesaurus, Dag Hannarskjold Library, United Nations
9. INFOTERRA, INFOTERRA Programme Activity Centre, United Nations
Environment Programme (proprietary)
10. Terminology Bulletin No.344, United Nations
11. Conservation Thesaurus, Tom Moritz, IUCN-The World Conservation
Union
12. Thesaurus for the Environment, Trilingual Version for Italy,
Italian Group for Environmental Terminology