TY  - BOOK
AU  - Wilson, Mercedes Arzu
TI  - The ovulation method of birth regulation: : the latest advances for achieving or postponing pregnancy - naturally
SN  - 0442295154
PY  - 1980///
CY  - New York
PB  - Van Nostrand
KW  - Rhythm method (Birth control)
KW  - Ovulation
KW  - Detection
ER  -