Sustainable development for the Great Plains : policy analysis
1994
Tyrchniewicz, Allen |
Wilson, Art |
Agriculture
The present state of mangrove ecosystems in Southeast Asia and the impact of Pollution - Philippines
1980
Gomez, E. D. |
Bilan des études en agropastoralisme au Tchad
Djelardje, Daniel N. |
An agricultural testament
1943
Howard, Albert |
Chena shifting cultivation and land transformation in the dry zone of Sri Lanka
1988
Gelbert, Michel |
Ecological grazing management : a development alternative for brittle environments - the case of Namibia
1989
Otzen, Uwe |
Pragas, praguicidas e a crise ambiental : problemas e soluçoes
1979
Paschoal, Adilson D. |