TY - Front. Earth Sci. A1 - Steven R. FASSNACHT, Ryan W. WEBB, William E. SANFORD T1 - Headwater regions — physical, ecological, and social approaches to understand these areas: introduction to the special issue Y1 - 2017-07-12 JF - Frontiers of Earth Science JO - Front. Earth Sci. SP - 443 EP - 446 VL - 11 IS - 3 UR - https://journal.hep.com.cn/fesci N1 - 10.1007/s11707-017-0667-7 ER -