title: More than obvious: better methods for interpreting nondetect data.
authors.affiliation: U.S. Geological Survey, Lakewood, CO, USA.
authors.forename: Dennis R
authors.initials: DR
authors.lastname: Helsel
mesh_terms: D004463:Ecology / Q000379:methods*; D004784:Environmental Monitoring / Q000379:methods*; D007287:Inorganic Chemicals / Q000032:analysis*; D009930:Organic Chemicals / Q000032:analysis*; D013223:Statistics as Topic / Q000379:methods*
chemical_list: D007287:Inorganic Chemicals; D009930:Organic Chemicals