@incollection{:/content/books/9789210477215c003, author = "International Narcotics Control Board", title = "Explanatory notes", booktitle = "Precursors and Chemicals Frequently Used in the Illicit Manufacture of Narcotic Drugs and Psychotropic Substances 2018", publisher = "United Nations", year = "2019", pages = "11-11", url = "https://www.un-ilibrary.org/content/books/9789210477215c003" }