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MCN Am J Matern Child Nurs. 2008 Nov-Dec;33(6):348-54. doi: 10.1097/01.NMC.0000341254.80426.32.
Efficacy of the Marquette Method of natural family planning.
Fehring RJ, Schneider M, Barron ML
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MCN Am J Matern Child Nurs. 2008 Nov-Dec;33(6):348-54. doi: 10.1097/01.NMC.0000341254.80426.32.
Fehring RJ, Schneider M, Barron ML