TY  - JOUR
A1  - Wilson, C.
A1  - Oeppen, J.
A1  - Pardoe, M.
T1  - What Is Natural Fertility? The Modelling of a Concept
Y1  - 1988
DO  - 10.2307/3644106
JF  - Population Index
VL  - 54
IS  - 1
SP  - 4
EP  - -20

ER  -