what would be the best practice of marking items such as
Plato. 1902. Republic. In Clitophon, Republic, Timaeus, Critias, vol. 4 of Opera, edited by J. Burnet,
327–621. Oxford Classical Texts. Oxford: Clarendon Press.
in MODS, i.e., a part, or chapter being part of a single volume being part of a multipart monograph
being part of a series?