==See also==*Art of Ancient Greece*Indian coinage*Philippeioi*Seleucid coinage*Silver stater with a turtle, early coin==Citations====Further reading==*Grierson, Philip (1975), "Numismatics", Oxford, Oxford University Press ISBN 0-19-885098-0*Head, Barclay V. (1911), "Historia Numorum; A Manual of Greek Numismatics", Oxford: Clarendon Press.
* Grierson, Philip (1975), "Numismatics", Oxford, Oxford University Press ISBN 0-19-885098-0* Head, Barclay V. (1911), "Historia Numorum; A Manual of Greek Numismatics", Oxford: Clarendon Press.