TY  - RPRT
TI  - Isolation of benzoylecgonine from urine using solid-phase extraction.
AU  - R E Anderson
AU  - G L Nixon
DO  - 10.1093/jat/17.7.432
UR  - https://pubmed.ncbi.nlm.nih.gov/8309218/
ID  - 8309218
ER  -