PMID 7207299 7207299 DOI 10.5694/j.1326-5377.1981.tb135299.x 10.5694/j.1326-5377.1981.tb135299.x
Cite this article
Billings, J. J. (1981). Ovulation method of contraception. *The Medical Journal of Australia*, *1*(1), 45-46. https://doi.org/10.5694/j.1326-5377.1981.tb135299.x
Billings JJ. Ovulation method of contraception. Med J Aust. 1981;1(1):45-46. doi:10.5694/j.1326-5377.1981.tb135299.x
Billings, J. J. "Ovulation method of contraception." *The Medical Journal of Australia*, vol. 1, no. 1, 1981, pp. 45-46.
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