Schwartz, S. I. (1980). The year book of surgery 1980. YearBook Medical.
Chicago-čujuhus (17. p.)Schwartz, Seymour I. The Year Book of Surgery 1980. YearBook Medical, 1980.
MLA-čujuhus (9. p.)Schwartz, Seymour I. The Year Book of Surgery 1980. YearBook Medical, 1980.
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