Although the bibliographic information in ACO aims to be as extensive and comprehensive as possible, consultation of the original sources or, if necessary, reproductions thereof is recommended and may be essential if one is to form a complete picture of content, layout, and so forth. For that reason, Appendix V provides images of title pages and publishers’ advertisements which are included in neither CFEO nor OCVE and which cannot be found on the websites of other major collections (e.g. F-Pn, PL-Wn, US-Cu, etc.).

Links are provided to enable straightforward comparison between the images of title pages or publishers’ advertisements and their corresponding descriptions in ACO. Such links will also facilitate identification of first-edition exemplars in the possession of libraries, private collectors, commercial firms, etc.