TY  - JOUR
A1  - Lerchl, A.
A1  - Simoni, M.
A1  - Nieschlag, E.
T1  - Changes in seasonality of birth rates in Germany from 1951 to 1990
Y1  - 1993
DO  - 10.1007/BF01140808
VL  - 80
IS  - 11

ER  -