TY - Sciences in Cold and Arid Regions A1 - T1 - Y1 - 2019-12-31 JF - Sciences in Cold and Arid Regions JO - Sciences in Cold and Arid Regions SP - 461 EP - 469 VL - 11 IS - 6 UR - http://www.scar.ac.cn N1 - 10.3724/SP.J.1226.2019.00461. ER -