Maintenance work on the ZORA database servers is scheduled for Thursday 25th July 2019 from 19:00-20:00. During this period ZORA and JDB will not be available. Thank you for your understanding.
Frick, Ulrich; Niggli, J; Gerlich, M (2005). Social norms towards cannabis consumption among visitors of the St Gallen Open Air 2004. European Journal of Public Health, 15(1):73-74.