00624nam a2200193Ia 450000100060000000300050000600500170001100800410002801000200006902000220008910000290011124501050014026000350024530000170028050000200029750400320031765000550034970000260040488210BIBL20160527204239.0810206r1980    nyua     b    00110 eng    a 81050275 //r82  z039452120Xc12.9510aBillings, Evelyn.2Local14aThe Billings methodbcontrolling fertility without drugs or devicescEvelyn Billings & Ann Westmore.0 aNew YorkbRandom Housecc1980.  a254 p.bill.  aIncludes index.  aBibliography: p. [230]-237. 0aNatural family planning.xOvulation method.2Local10aWestmore, Ann.2Local