TY  - RPRT
TI  - Complications with using ratios for environmental data: Comparing enantiomeric ratios (ERs) and enantiomer fractions (EFs)
AU  - E.M. Ulrich
AU  - D.R. Helsel
AU  - W.T. Foreman
PY  - 2003
DO  - 10.1016/s0045-6535(03)00538-1
UR  - https://pubs.usgs.gov/publication/70024877
ID  - 70024877
ER  -