Symposium on Eco-regional Approaches in Agricultural Research)4991 : ISNAR(
Eco-regional approaches for sustainable land use and food production: proceedings of a Symposium on Eco-regional Approaches in Agricultural Research, 12-16 December 1994, ISNAR, The Hague
Dordrecht ;Boston
Kluwer Academic Publishers in cooperation with International Potato Center )CIP(
1995
xiii, 505 p.:ill., maps;25 cm
System approaches for sustainable agriculture development ;v. 4