N. B. Wu Chen

Simultaneous quantitation of morphine and codeine in biological samples by electron impact mass fragmentography.

M. Schaffer, R. Stein, N. B. Wu Chen, 1982, Journal of analytical toxicology.

The general toxicology unknown. II. A case report: doxylamine and pyrilamine intoxication.

M. Schaffer, E. Donoghue, R. Stein, 1983, Journal of forensic sciences.

Spontaneous live birth with a maternal history of intravenous use of pentazocine and tripelennamine (T's and blues).

M. Schaffer, R. Stein, N. B. Wu Chen, 1983, Journal of forensic sciences.

Methanol intoxication: distribution in postmortem tissues and fluids including vitreous humor.

M. Schaffer, E. Donoghue, N. B. Wu Chen, 1985, Journal of forensic sciences.

The general toxicology unknown. I. The systematic approach.

M. Schaffer, E. Donoghue, R. Stein, 1983, Journal of forensic sciences.

Analysis of blood and tissue for amoxapine and trimipramine.

M. Schaffer, J. Hadač, R. Stein, 1983, Journal of forensic sciences.