TY  - RPRT
TI  - Coherent changes in relative C4 plant productivity and climate during the late Quaternary in the North American Great Plains
AU  - L. Nordt
AU  - J. Von Fischer
AU  - L. Tieszen
AU  - J. Tubbs
PY  - 2008
DO  - 10.1016/j.quascirev.2008.05.008
UR  - https://pubs.usgs.gov/publication/70000306
ID  - 70000306
ER  -