Contraceptive technique:

Eitemau Tebyg

• The politics of contraception: the present and the future/
  gan: Djerassi, Carl
  Cyhoeddwyd: (1979)
• Textbook of contraceptive practice:
  gan: Potts, Malcolm
  Cyhoeddwyd: (1983)
• Contraceptive chaos
  gan: Dinsa Sachan
• Contraception: the chemical control of fertility,
  Cyhoeddwyd: (1969)
• Selected recommendations for contraceptive use
  Cyhoeddwyd: (2002)