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. 1979 Jan-Feb;11(1):40-1.

No authors listed

No authors listed. Fam Plann Perspect. 1979 Jan-Feb.

. 1979 Jan-Feb;11(1):40-1.

No abstract available

[Natural family planning. International developments, current status, future aspects].
Lanctot CA. Lanctot CA. Gynakologe. 1985 Dec;18(4):231-3. Gynakologe. 1985. PMID: 4093037 German. No abstract available.
[Family planning in Colombia -- 1987].
Trias M. Trias M. Profamilia. 1987 Sep;3(9-10):5-9. Profamilia. 1987. PMID: 12315078 Spanish.
Natural family planning: can it work?
Shivanandan M. Shivanandan M. Marriage Fam Living. 1976 Nov;58(11):9-11. Marriage Fam Living. 1976. PMID: 12266169
[How natural is "natural family planning"? Critical remarks from the biological behavior viewpoint].
Neumann GH. Neumann GH. Gynakologe. 1989 Feb;22(1):1-6. Gynakologe. 1989. PMID: 2653974 Review. German.
New low- and high-tech calendar methods of family planning.
Fehring RJ. Fehring RJ. J Midwifery Womens Health. 2005 Jan-Feb;50(1):31-8. doi: 10.1016/j.jmwh.2004.07.001. J Midwifery Womens Health. 2005. PMID: 15637512 Review.