Michael H. Crawford (Cambridge, 1975)
The most important single work of reference for Republican coins; it replaces the older catalogues of Sydenham and Babelon. Each issue is numbered and references given to the earlier catalogues, or to the major collection holding the type-specimen. Following each entry is a numismatic and historical discussion of the issue. The work commences with a detailed discussion of the chronological issues and the evidence followed in the establishment of the catalogue framework. The work also includes a series of important studies on issues of Republican coinage. The only minor fault is the paucity of the illustrated material.
Vol. 1. Introduction and Catalogue
Vol. 2. Studies and Plates
E.A. Sydenham (London, 1952)
xxx
H.A. Grueber (London, 1910, reprinted 1970)
xxx
Vol. 1. Aes rude, aes signatum, aes grave, and coinage of Rome from BC 268.
Vol. 2. Coinages of Rome (continued), Roman Campania, Italy, the Social War, and the Provinces.
Vol. 3. Table of Finds and Cognomina, Indexes, Plates.
Vols. 1 and 2 can be downloaded in pdf format from Internet Archive.
The entire B.M. collection has now been photographed and made available for study via searchable database on the B.M. website; see Web Resources section.