TY  - RPRT
TI  - Ages of travertine deposits in eastern Grand Canyon National Park, Arizona
AU  - Barney J. Szabo
PY  - 2017
DO  - 10.1016/0033-5894(90)90070-2
UR  - https://pubs.usgs.gov/publication/70016360
ID  - 70016360
ER  -