TY  - RPRT
TI  - Fabricating data: How substituting values for nondetects can ruin results, and what can be done about it
AU  - D.R. Helsel
PY  - 2006
DO  - 10.1016/j.chemosphere.2006.04.051
UR  - https://pubs.usgs.gov/publication/70028920
ID  - 70028920
ER  -