1. Campbell K. L.1977. Metabolic interactions of hormonal steroids and chlorinated hydrocarbons: Effects of neonatal treatment with o p'‐DDT on the development of the steroidogenic endocrine system of the male rat. Ph.D. thesis. University of Michigan. University Microfilms. Ann Arbor MI.
2. Demographic and endocrinological aspects of low natural fertility in highland New Guinea
3. Wood J. W. D.Lai P. L.Johnson K. L.Campbell&I. A.Maslar.1985.Lactation and birth spacing in highland New Guinea. J. Biosoc. Sci.(Suppl. 9):157–173.