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WILLIAMS JH, ULLERY JC, SHAFFER TE, et al. Dynamic investigation of perinatal mortality. Am J Obstet Gynecol. 1958;76(2):305-11doi: 10.1016/0002-9378(58)90218-7.
WILLIAMS, J. H., ULLERY, J. C., SHAFFER, T. E., & NEWTON, W. A. (1958). Dynamic investigation of perinatal mortality. American journal of obstetrics and gynecology, 76(2), 305-11. https://doi.org/10.1016/0002-9378(58)90218-7
WILLIAMS, J H, et al. "Dynamic investigation of perinatal mortality." American journal of obstetrics and gynecology vol. 76,2 (1958): 305-11. doi: https://doi.org/10.1016/0002-9378(58)90218-7
WILLIAMS JH, ULLERY JC, SHAFFER TE, NEWTON WA. Dynamic investigation of perinatal mortality. Am J Obstet Gynecol. 1958 Aug;76(2):305-11. doi: 10.1016/0002-9378(58)90218-7. PMID: 13559320.
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