TY  - RPRT
TI  - Long-term change along the Colorado River in Grand Canyon National Park (1889-2011)
AU  - R. H. Webb
AU  - J. Belnap
AU  - M. L. Scott
AU  - J.M. Friedman
AU  - T.C. Esque
PY  - 2012
UR  - https://pubs.usgs.gov/publication/70175257
ID  - 70175257
ER  -