World Health Organization. (1973). Cervical mucus in human reproduction: Based on a colloquium held in Geneva on 18-20 September 1972, within the WHO Expanded Programme of Research, Development, and Research Training in Human Reproduction. Scriptor.

World Health Organization. Cervical Mucus in Human Reproduction: Based on a Colloquium Held in Geneva on 18-20 September 1972, Within the WHO Expanded Programme of Research, Development, and Research Training in Human Reproduction. Copenhagen: Scriptor, 1973.

World Health Organization. Cervical Mucus in Human Reproduction: Based on a Colloquium Held in Geneva on 18-20 September 1972, Within the WHO Expanded Programme of Research, Development, and Research Training in Human Reproduction. Scriptor, 1973.