I do forensics research, & i'm revising a list of precursors for illicit drugs. having a hard time finding a good ref. site/ book. suggestions? thanks

Keep digging...: Haven't seen a cookbook (the government surely frowns upon cookbooks) for illegal drugs. Keep checking one website after another, and your data will grow. The site http://www.Incb.Org/incb/en/precursors/index.Html leads to a page of precursors, but doesn't say exactly which drugs each precursor is used to make. Also, ask president obama (http://www.Whitehouse.Gov/ondcp/precursor-chemicals).