Average THC, CBD, and CBN Levels of Seized Domestic Cannabis in the US, 1995-2015
National Drug Control Strategy Data Supplement 2016, Executive Office of the President: Office of National Drug Control Policy, Jan. 2017, Table 77, p. 87, citing University of Mississippi, National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences. Quarterly Report #134, Potency Monitoring Program (September 2016).
Quarterly Report #104, Dec. 16, 2008 - March 15, 2009, University of Mississippi Potency Monitoring Project (Oxford, MS: National Center for Natural Products Research, a Division of the Research Institute of Pharmaceutical Sciences, 2008), Mahmoud A. ElSohly, PhD, Director, NIDA Marijuana Project (NIDA Contract #N01DA-5-7746), pp. 8 and 10.