Ionici testimonianze e frammenti - Thales Milesius ca. 6. Jh. v. Chr; Anaximander Milesius v610-v546; Anaximenes Milesius v546-v528; Hippon Rheginus ca. v500; Diogenes Apolloniates ca. v5. Jh (Biblioteca di studi superiori, 1963)