Aristophanes, Frogs 725-726. Aristophanes, Ekklesiazousai 815-822. Aristotelis, Oikonomika 2.23.1. M.N. Tod, Epigraphical Notes on Greek Coinage I: ΚΟΛΛΥΒΟΣ, NC, ser. 6, 5, 1945 (pp. 108-116), pp. 111-112 ... Agora 26 25 ... Tod, BSA 28, 1927-1928, pp. 153-157 ... L. Threatte, The Grammar of Attic Inscriptions I, Berlin/New York 1980, pp. 27-28 ... M.N. Tod, Epigraphical Notes on Greek Coinage I:
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