John, Allan u. E.J. Rapson: A Catalogue of the Indian Coins in the British Museum (1914). Band I: Coins of Ancient India, Band II:Coins of the Gupta Dynasties and of Sasanka, king of Gauda, Band III: Coins of the Andhra Dynasty, reprint 1967. Umschläge stark verbraucht,somit I-II
I-II