@incollection{:/content/books/9789210056458c010, author = "International Narcotics Control Board", title = "Reported statistics from countries and territories on substances controlled under the Convention on Psychotropic Substances of 1971, 2019 and average for 2016–2018", booktitle = "Psychotropic Substances 2020", publisher = "United Nations", year = "2021", pages = "267-437", url = "https://www.un-ilibrary.org/content/books/9789210056458c010" }