TY  - RPRT
TI  - Tracers in groundwater: Use of microorganisms and microspheres
AU  - Ronald W. Harvey
AU  - Hauke Harms
PY  - 2003
DO  - 10.1002/0471263397.env157
UR  - https://pubs.usgs.gov/publication/70199231
ID  - 70199231
ER  -