TY  - BOOK
ED  - 856WHO Scientific Group on the Biology of Fertility Control by Periodic Abstinence.
ED  - World Health Organization.
TI  - Biology of fertility control by periodic abstinence: report of a WHO Scientific Group [meeting held in Geneva from 31 May to 6 June 1966]
SN  - 9241203609
PY  - 1967///
CY  - Geneva
PB  - World Health Organization
KW  - Natural family planning methods
N1  - Russian version of nos. 348-365 bound together (barcode no. 00072086); Copy 2 of English, French and Spanish eds. bound together
UR  - http://apps.who.int/iris/
ER  -