Preschool left-behind children's mental health status and intervention effect in the rural area of Shandong province.
CHEN Zhao-jun,XU Ling-zhong,GAI Ruo-yan,ZHAO Si-qi,XU Xin,WANG Heng.
journal1 . 2015, (10): 1038 -1040 .  DOI: 10.11852/zgetbjzz2015-23-10-09