@article{ref1,
title="Hans Derks, History of the Opium Problem: The Assault on the East, ca. 1600-1950",
journal="Social history of medicine",
year="2013",
author="Smith, Norman",
volume="26",
number="3",
pages="584-585",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0951-631X",
doi="10.1093/shm/hkt023",
url="http://dx.doi.org/10.1093/shm/hkt023"
}