Deaths in the first 20 years and problems of the sex ratio at birth.
作者信息
Whitfield A G, Bayliss R, Clarke C
机构信息
Research Unit, Royal College of Physicians, London.
出版信息
J R Coll Physicians Lond. 1987 Oct;21(4):270-4.
Abstract
摘要
Whitfield A G, Bayliss R, Clarke C
Research Unit, Royal College of Physicians, London.
J R Coll Physicians Lond. 1987 Oct;21(4):270-4.
Zotero 插件