On solid ground :
On solid ground : science, technology, and integrated land management /
United Nations.
- Ottawa : IDRC, 1997.
- xii, 66 p.
0889368201
Land use--Management.
Land use--Planning.
Sustainable development.
HD 111 / .U57
0889368201
Land use--Management.
Land use--Planning.
Sustainable development.
HD 111 / .U57