TY  - RPRT
TI  - Geochemical mapping of the Denver, Colorado (USA) urban area: A comparison of studies in 1972 and 2005
AU  - D. B. Smith
AU  - R. G. Garrett
AU  - G. Closs
AU  - K.J. Ellefsen
AU  - J.E. Kilburn
AU  - J.D. Horton
AU  - S. M. Smith
PY  - 2011
UR  - https://pubs.usgs.gov/publication/70004427
ID  - 70004427
ER  -