Food security and environmental quality in the developing world : Chapter 6: Soil Degradation as a Threat to Food Security /
by R.P. Narwal, B.R.Singh and R.S. Antil ; Rattan Lal, David Hansen, Norman Uphoff & Steven Slack. ; foreword by Lester R. Brown.
- Boca Raton, Fla. : Lewis Publishers/CRC Press, 2003
- 4 pages : illustrations, maps