Modern science and the human fertility problem:

Eitemau Tebyg

• The safest way /
  gan: Pickard, Christine
  Cyhoeddwyd: (1968)
• Family planning a global handbook for providers:evidence based guidance developed through world wide collaboration
  Cyhoeddwyd: (2011)
• Birth control
  gan: Hardin, Garrett
  Cyhoeddwyd: (1971)
• Developing new contraceptives: Obstacles and opportunities
  gan: Mastroianni, Luigi, Ed., et al
  Cyhoeddwyd: (1990)
• Birth Control : Contraception And Abortion
  gan: Rudel, Harry W and Kincl, Fred A and Henzl, Milan R
  Cyhoeddwyd: (1973)