Saya mau tau George Hempl: dari Carmen Saliare

III.—The Origin of the Latin Letters G and Z. By Prof. George Hempl, in: Transactions and Proceedings of the American Philological Association. 1899. Volume XXX, pp. 26 & 39f. (JSTOR):

XII.—The Salian Hymn to Janus. By Prof. George Hempl, in: Transactions and Proceedings of the American Philological Association. 1900. Volume XXXI'', pp. 182ff. (JSTOR, IA, google-US)