天津市区及郊区20岁以下青少年人工流产情况调查

殷震惠;杨华

The Investigation of Artificial Abortion of Adolescents Under the Age of 20 in Tianjin Urban and Suburban

YIN Zhen-hui;YANG Hua

国际生殖健康/计划生育杂志 . 2012, (6): 452 -454 .