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Int J Adolesc Med Health. 1987;3(2):101-19.
Fertility awareness / natural family planning for adolescents and their families: report of multisite pilot project.
Klaus H, Bryan LM, Bryant ML, Fagan MU, Harrigan MB, Kearns F
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Int J Adolesc Med Health. 1987;3(2):101-19.
Klaus H, Bryan LM, Bryant ML, Fagan MU, Harrigan MB, Kearns F