TY  - RPRT
TI  - Chemical composition of sedimentary rocks in Colorado, Kansas, Montana, Nebraska, North Dakota, South Dakota, and Wyoming
AU  - Thelma P. Hill
AU  - Marian A. Werner
AU  - M. Julia Horton
PY  - 1967
DO  - 10.3133/pp561
UR  - https://pubs.usgs.gov/publication/pp561
ID  - pp561
ER  -