TY  - BOOK
AU  - Potter,Robert G.
ED  - Milbank Memorial Fund
TI  - Length of the fertile period
PY  - 1961///?]
CY  - [New York
PB  - Milbank Memorial Fund
KW  - Menstrual cycle
KW  - Mathematical models
KW  - Local
KW  - Fertility, Human
N1  - Caption title; "Reprinted from The Milbank Memorial Fund quarterly, January 1961, vol. XXXIX, no. 1, pp. 132-162."; Includes bibliographical references
ER  -