1. 1993. Population politics: the choices that shape our future. New York: Plenum.
2. 1999. World population: challenges for the 21st century. Santa Ana, CA: Seven Locks Press.
3. 1999. Beyond Malthus: nineteen dimensions of the population challenge. New York: W.W. Norton.
4. 1980. Overshoot: the ecological basis of revolutionary change. Urbana: University of Illinois Press.