TY  - RPRT
TI  - Mortality and fertility control.
AU  - C Tietze
AU  - S Lewit
PY  - 1977
DO  - 10.1002/j.1879-3479.1977.tb00656.x
UR  - https://pubmed.ncbi.nlm.nih.gov/606579/
ID  - 606579
ER  -