Gatekeeper series
International Institute for Environment and Development
Roland Bunch, Gabino Lopez
Sustainable Agriculture Programme of the International Institute for Environment and Development 1995 Gatekeeper series no.55
Available at 1 libraries
Alan Fowler
Sustainable Agriculture Programme of the International Institute for Environment and Development [1992] Gatekeeper series no. 35
N.S. Jodha
the Sustainable Agriculture Programme of the International Institute for Environment and Development [1991] Gatekeeper series no. SA24