Home › Authors › Paul N. Griffiths 👤 Paul N. Griffiths b. 1960 ยท 3 books Biography Scientific Director at the European Monitoring Centre on Drugs and Drug Addiction Books by Paul N. Griffiths Cannabis production and market Cannabis production and markets in Europe 2012 Qat use in London Qat use in London 1998 New trends in synthetic drugs New trends in synthetic drugs in the European Union 1997