A study of the five Zarathushtrian (Zoroastrian) Gâthâs : with texts and translations, also with the Pahlavi translation for the first time edited with collation of manuscripts, and now prepared from all the known codices, also deciphered, and for the first time translated in its entirety into a European language, with Neryosangh's Sanskrit text edited with the collation of five MSS., and with a first translation, also with the Persian text contained in Codex 12b of the Munich collection edited in transliteration, together with a commentary, being the literary apparatus and argument to the translation of the Gâthâs in the XXXIst volume of the Sacred books of the East