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Basic practicalities of natural family planning in terms of of international symbols 0I0 ανά Ganar, Linda

Basic practicalities of natural family planning in terms of Philippine symbols RDXM ανά Ganar, Linda

Calendar method unreliable in family planning, study says

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Periodic abstinence in the Philippines new findings from a national survey ανά Laing, John E.

And they call it "rhythm" the practice of periodic abstinence in Bicol and the Visayas regions ανά Logarta-Avila, Josephine

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