TY  - RPRT
TI  - The urban environmental gradient: Anthropogenic influences on the spatial and temporal distributions of lead and zinc in sediments
AU  - Edward Callender
AU  - Karen C. Rice
PY  - 1999
DO  - 10.1021/es990380s
UR  - https://pubs.usgs.gov/publication/70022510
ID  - 70022510
ER  -