III. Works of Reference Most Frequently Cited.
Gardthausen, V.: Augustus und seine Zeit. 1er Th., 1er Bd., pp. VIII, 484; 2er Th., 1er Hlb., pp. 276. Leipzig, 1891. 1er Th., 2er Bd., pp. 485-1032; 2er Th., 2er Hlb., pp. 277-649. 1896.
Not yet completed; the standard work on the subject. Second part contains the references. (Aug.)
Marquardt, Joachim: Römische Staatsverwaltung.
Mommsen, Theodor: Römische Geschichte. (Röm. Gesch.)
Corpus Inscriptionum Latinarum. (C. I. L.)