TY  - RPRT
TI  - A modified sequential contraceptive.
AU  - E Rice-Wray
AU  - J Gorodovsky
AU  - A Peña
PY  - 1972
DO  - 10.1016/0010-7824(72)90012-1
UR  - https://pubmed.ncbi.nlm.nih.gov/4119579/
ID  - 4119579
ER  -