Fertility Awareness · Effectiveness
Natural family planning methods
Published May 1982 American Journal of Obstetrics and Gynecology, 143(1), 114-115
Cite this paper
Billings, J. J. (1982). Natural family planning methods. American Journal of Obstetrics and Gynecology, 143(1), 114-115.
Billings JJ. Natural family planning methods. Am J Obstet Gynecol. 1982;143(1):114-115.
Billings, J. J. "Natural family planning methods." American Journal of Obstetrics and Gynecology, vol. 143, no. 1, 1982, pp. 114-115.
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1 institution- St Vincent's HospitalMelbourne


