Smith, D. W., & Bierman, E. L. (1973). The biologic ages of man: From conception through old age. W.B. Saunders.

Smith, David W., and Edwin L. Bierman. The Biologic Ages of Man: From Conception Through Old Age. Philadelphia: W.B. Saunders, 1973.

Smith, David W., and Edwin L. Bierman. The Biologic Ages of Man: From Conception Through Old Age. W.B. Saunders, 1973.