TY  - RPRT
TI  - Statistical evaluation of contraceptive methods.
AU  - C Tietze
AU  - S Lewit
PY  - 1974
DO  - 10.1007/978-1-4612-4702-9_11
UR  - https://pubmed.ncbi.nlm.nih.gov/4825701/
ID  - 4825701
ER  -