Estrategia y politicas nacionales de conservacion de los recursos naturales renovables y del ambiente
1976
Conservation strategies
The Puerto Rico plan : environmental protection through development rights transfer
1974
Costonis, John J. |
Harmonie et désordre dans l'environnement canadien
1980
Dansereau, Pierre |
Should wildlife pay its way? Keith Roby Address Perth, Australia, 8 December 1993
1994
Martin, R. B. |
First national conservation conference on natural resources
Matus, Noel M. |
Felipe, Milagros S. |
Rivera, Patricia C. |
Plan national de lutte contre la désertification
1987
Kane, Abdoulaye |
Taal, Bye Maas |
Wit, Piet de |
Bellot, Jean-Marc |
Rochette, R. M. |
Ambiente : piano e progetti : recupero, valorizzazione e sviluppo dell ricorse naturalistiche della Campania
1988
Cerami, Giovanni |