Opium

• Brouardel P. Opium, morphine et cocaïne : intoxication aiguë par l’opium, mangeurs et fumeurs d’opium, morphinomanes et cocaïnomanes, 1906.
• Leigh J. An experimental inquiry into the properties of opium, and its effects on living subjects : with observations on its history, preparations and uses : being the disputation which gained the Harveian prize for the year 1785.
• Young G. A treatise on opium, founded upon practical observations, 1753.