Research and quality control in natural family planning with relational database systems

C Gnoth1, M Bremme, R Klemm

  • 1Forschungsprojekt NFP der Heinrich-Heine Universität Düsseldorf, Germany.

Advances in Contraception : the Official Journal of the Society for the Advancement of Contraception
|January 6, 2001
PubMed

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