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Med J Aust. 1981 Jan 10;1(1):45-6. doi: 10.5694/j.1326-5377.1981.tb135299.x.

Ovulation method of contraception.

Billings JJ

Source:

https://doi.org/10.5694/j.1326-5377.1981.tb135299.x

PubMed:

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