:::::::And what I mean is your are making assumptions about my motives that you likely wouldn't make otherwise.  Believe it or not, I did not predetermine I was going to discuss cocaine - if I didn't find anything I considered a secondary source, I wouldn't have written anything.  I don't think it is helpful to make guesses about my motives or what I would do elsewhere. Moving on...  Thank you for providing this new source, that was very helpful of you.  I will post a suggested revision using it tomorrow.  How did you find the source - my method of tracking down secondary sources (look at citing papers at random) is not very efficient and I haven't found a good way to do searches on any of the academic paper databases I have access to in order to find sources directly.