1. Beverton, R.J.H., and Holt, S.J., On the Dynamics of Exploited Fish Populationss. Ministry of Agriculture, Fisheries and Food (London), Fish. Inv. Ser. 2, Vol. 19 (1957).
2. Ciriacy-Wantrup, S.V., Resource Conservation: Economics and Policies. Univ. of California Press (Berkeley) (1963).
3. Clark, C.W., Profit maximization and the extinction of animal species, Journal of Political Economy 81, 950–961 (1973a).
4. —, The economics of overexploitation, Science 181, 630–634 (1973b).
5. —, When should whaling resume? (To appear) (1973c).