TY - RPRT TI - Effects of age and environment on stable carbon isotope ratios in tree rings of riparian Populus AU - Jonathan M. Friedman AU - Craig A. Stricker AU - Adam Z Csank AU - Honghua Zhou PY - 2019 DO - 10.1016/j.palaeo.2019.03.022 UR - https://pubs.usgs.gov/publication/70202840 ID - 70202840 ER -