Cyclic variations in date of last menstrual period of mothers of infants with congenital malformations in South Wales, 1964-66.
نویسندگان
چکیده
منابع مشابه
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متن کاملEpidemiology of pregnancies with unknown last menstrual period
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ژورنال
عنوان ژورنال: Journal of Epidemiology & Community Health
سال: 1972
ISSN: 0143-005X
DOI: 10.1136/jech.26.4.212