There is a book published by ASTA and is available for purchase on their website - Official Analytical Methods fo the American Spice Trade Association. the current edition is 1997 - with updates from 2004. However, the book is mainly comprised of methods relating to physical and chemical testing methods for spices. There is only an appendix that lists ASTA recommend test micro methods by test organism. All of the methods listed reference methods in FDA-BAM, AOAC, and the Compedium of Methods for the Microbiological Examination of Foods.