TY  - RPRT
TI  - Investigation of the quality of ground water in the vicinity of Derby, Colorado
AU  - L. R. Petri
AU  - R.O. Smith
PY  - 1959
DO  - 10.3133/ofr5993
UR  - https://pubs.usgs.gov/publication/ofr5993
ID  - ofr5993
ER  -