The collected responses to Simon and other population revisionists. Cloud, P.E. 1968. Realities of Mineral Distribution. Man and His Physical Environment. Hardin, G. 1971.
Nobody ever dies of overpopulation.
Herring, J.R. and Fantel, R.J. 1993. Phosphate rock demand into the next century. Impact on world food supply. Pimentel, D., Harman, R., Pacenza, M. Pecarsky, J. and Pimentel, M. 1994. Natural resources and an optimum human population.