TY  - RPRT
TI  - Progestogen-only oral contraception and ectopic gestation.
AU  - M Smith
AU  - M P Vessey
AU  - W Bounds
AU  - J Warren
PY  - 1974
DO  - 10.1136/bmj.4.5936.104-c
UR  - https://pubmed.ncbi.nlm.nih.gov/4415323/
ID  - 4415323
ER  -