D. W. Johnson

A synthetic opioid peptide increases plasma growth hormone and prolactin in Holstein calves.

R. Pearson, R. Akers, M. Barnes, 1993, Journal of animal science.

Clandestine drug laboratories.

D. W. Johnson, J. W. Gunn, W. P. Butler, 1970, Journal of forensic sciences.

Dangerous drugs: adulterants, diluents, and deception in street samples.

D. W. Johnson, J. W. Gunn, 1972, Journal of forensic sciences.