Mannion, M., Gurr, M. R., Davis, A. E., & Wisch, N. (1970). Blood Groups a Programmed Learning Manual.
Chicago-čujuhus (17. p.)Mannion, Margaret, Majorie R. Gurr, Audrey E. Davis, juo Nathaniel Wisch. Blood Groups a Programmed Learning Manual. 1970.
MLA-čujuhus (9. p.)Mannion, Margaret, et al. Blood Groups a Programmed Learning Manual. 1970.
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