Catalogue of the Greek Coins of Arabia, Mesopotamia, and Persia (Nabataea, Arabia Provincia, S. Arabia, Mesopotamia, Babylonia, Assyria, Persia, Alexandrine Empire of the East, Persis, Elymais, Characene) George Francis Hill, keeper of coins and medals at the Royal British Museum. London, 1922. This is a big volume: 358 pages, 55 plates. So give it a few minutes to download. http://ia600202.us.archive.org/5/ite...ekco00brit.pdf
I'll repost the link Ardatirion gave in another thread to the Library of Ancient Coinage at Numiswiki. http://www.forumancientcoins.com/numiswiki/view.asp?key=Library of Ancient Coinage