00341nam a22000977a 4500020001500000100002300015245010800038260005700146300001100203650002900214  a1885960018  aHatcher, Robert A.  aThe essentials of contraceptive technology :ba handbook for clinic staff /cRobert A. Hatcher [et al.]  aBaltimore :bPopulation Information Program /c1997.  a150 p.  aContraceptive technology