Analysis of the current status of outdoor activity time of Chinese students in 2016
XU Rong-bin, GAO Di, WANG Zheng-he, ZOU Zhi-yong, HU Pei-jin, MA Jun, SONG Yi
journal1 . 2018, (3): 254 -257 .  DOI: 10.11852/zgetbjzz2018-26-03-07