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MCN Am J Matern Child Nurs. 2013 Nov-Dec;38(6):352-8. doi: 10.1097/NMC.0b013e3182a1ecc0.
Influence of motivation on the efficacy of natural family planning.
Fehring RJ, Schneider M, Barron ML, Pruszynski J
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MCN Am J Matern Child Nurs. 2013 Nov-Dec;38(6):352-8. doi: 10.1097/NMC.0b013e3182a1ecc0.
Fehring RJ, Schneider M, Barron ML, Pruszynski J