TY  - RPRT
TI  - A formula for selecting the optimum time for conception.
AU  - E J FARRIS
PY  - 1952
DO  - 10.1016/0002-9378(52)90556-5
UR  - https://pubmed.ncbi.nlm.nih.gov/14923716/
ID  - 14923716
ER  -