Echenhoff, J. E. (1981). The yearbook of anesthesia 1981. YearBook Medical.
Chicago-viite (17. p.)Echenhoff, James E. The Yearbook of Anesthesia 1981. YearBook Medical, 1981.
MLA-viite (9. p.)Echenhoff, James E. The Yearbook of Anesthesia 1981. YearBook Medical, 1981.
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