Montana, I recommend checking out Theodore Hazen's website at http://www.angelfire.com/journal/pondlilymill/index.html. It includes several informative articles, and Theodore may be able to direct you to other sources as well. Good luck! :) Jennifer Palmer Webmaster, archaeologyfieldwork.com http://www.archaeologyfieldwork.com _________________________________________________________________ Don’t just search. Find. Check out the new MSN Search! http://search.msn.click-url.com/go/onm00200636ave/direct/01/