TY  - RPRT
TI  - Improved method for morphine extraction from biological samples.
AU  - G L Sprague
AU  - A E Takemori
PY  - 1979
DO  - 10.1002/jps.2600680543
UR  - https://pubmed.ncbi.nlm.nih.gov/430514/
ID  - 430514
ER  -