While I have no problem with Van Meter, lets point out that John Jeneck's wonderful resource is free to use and will ID rulers as long as the coins are legible to a degree. I was less a fan of ERIC but that changed when the author gave it free for download making it the best bargain out there. http://dirtyoldbooks.com/eric.html There are hundreds of really good free sites on ancient coins so the only excuse for not studying is having higher priorities in your life than the coins. Coin Talk is certainly one of the places on the web worthy of your time.