Não informado. (1968). Singapore journal of obstetrics and gynaecology. Obstetrical and Gynaecological Society of Singapore.
Chicago-referens (17:e uppl.)Não informado. Singapore Journal of Obstetrics and Gynaecology. Singapore: Obstetrical and Gynaecological Society of Singapore, 1968.
MLA-referens (8:e uppl.)Não informado. Singapore Journal of Obstetrics and Gynaecology. Obstetrical and Gynaecological Society of Singapore, 1968.
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