<p>请大家帮忙下篇文章 </p><p>Causes and Implications of the Recent Increase in the Reported Sex Ratio at Birth in China <br/>Zeng Yi, Tu Ping, Gu Baochang, Xu Yi, Li Bohua and Li Yongpiing <br/>Population and Development Review, Vol. 19, No. 2 (Jun., 1993), pp. 283-302 <br/>(article consists of 20 pages) <br/>Published by: Population Council <br/>Stable URL: <a href="http://www.jstor.org/stable/2938438">http://www.jstor.org/stable/2938438</a></p><p></p><p>因为我没有jstor的账号</p><p>可以的话请发到邮箱 <a href="mailto:1041054735@qq.com">1041054735@qq.com</a></p><p>先谢谢了</p>