The Upanishads, Part 2 (SBE15), by Max Müller, , at sacred-texts.com
THIS Upanishad has been so often edited and discussed that it calls for no special remarks. It forms part of the Satapatha-brâhmana. In the Mâdhyandina-sâkhâ of that Brâhmana, which has been edited by Professor Weber, the Upanishad, consisting of six adhyâyas, begins with the fourth adhyâya (or third prapâthaka) of the fourteenth book.
There is a commentary on the Brihadâranyaka-upanishad by Dvivedasrînârâyanasûnu Dvivedagaṅga, which has been carefully edited by Weber in his great edition of the Satapatha-brâhmana from a MS. in the Bodleian Library, formerly belonging to Dr. Mill, in which the Upanishad is called Mâdhyandinîya-brâhmana-upanishad.
In the Kânva-sâkhâ the Brihadâranyaka-upanishad forms the seventeenth book of the Satapatha-brâhmana, consisting of six adhyâyas.
As Saṅkara's commentary and the gloss of Ânandatîrtha, edited by Dr. Roer in the Bibliotheca Indica, follow the Kânva-sâkhâ, I have followed the same text in my translation.
Besides Dr. Roer's edition of the text, commentary and gloss of this Upanishad, there is Poley's edition of the text. There is also a translation of it by Dr. Roer, with large extracts from Saṅkara's commentary.