TY  - RPRT
TI  - Contraceptive development for developing countries: unmet needs.
AU  - G W Perkin
AU  - G W Duncan
AU  - R T Mahoney
AU  - R H Smith
PY  - 1976
DO  - 10.1098/rspb.1976.0108
UR  - https://pubmed.ncbi.nlm.nih.gov/13379/
ID  - 13379
ER  -