TY  - RPRT
TI  - Fertility awareness-based methods for contraception.
AU  - D A Grimes
AU  - M F Gallo
AU  - V Grigorieva
AU  - K Nanda
AU  - K F Schulz
PY  - 2004
DO  - 10.1002/14651858.cd004860.pub2
UR  - https://pubmed.ncbi.nlm.nih.gov/15495128/
ID  - 15495128
ER  -