Mannion, M., Gurr, M. R., Davis, A. E., & Wisch, N. (1970). Blood Groups a Programmed Learning Manual.

Mannion, Margaret, Majorie R. Gurr, Audrey E. Davis, and Nathaniel Wisch. Blood Groups a Programmed Learning Manual. 1970.

Mannion, Margaret, et al. Blood Groups a Programmed Learning Manual. 1970.