Browsing by Author "Stevenson, W. S."
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- ItemPregnancy outcome associated with natural family planning (NFP): scientific basis and experimental design for an international cohort study(1988) Simpson, J. L.; Gray, R. H.; Queenan, J. T.; Mena Nannig, Patricia Isabel; Perez. A.; Kambic, R. T.; Tagliabue, G.; Pardo, F.; Stevenson, W. S.; Barbato, M.; Jennings, V. H.; Zinaman, M. J.; Spieler, J. M.Pregnancy outcome associated with natural family planning (NFP): scientific basis and experimental design for an international cohort study