Backett, E. M., Davies, A. M., & Petros-Barvazian, A. (1984). The risk approach in health care: With special reference to maternal and child health, including family planning. World Health Organization ; WHO Publications Centre USA [distributor].

Backett, E. Maurice, A. Michael Davies, and Angèle Petros-Barvazian. The Risk Approach in Health Care: With Special Reference to Maternal and Child Health, Including Family Planning. Geneva : Albany, NY: World Health Organization ; WHO Publications Centre USA [distributor], 1984.

Backett, E. Maurice, et al. The Risk Approach in Health Care: With Special Reference to Maternal and Child Health, Including Family Planning. World Health Organization ; WHO Publications Centre USA [distributor], 1984.