NOTE: in addition to standard abbreviations, in this bibliography the special abbreviation dpr (digitized photographic reproduction) is employed; unless otherwise specified, the file in question is in PDF format. Other abbreviations used are: GDZ = Göttinger Digitalisierungszentrum; HAB = Herzog August Bibliothek, MDZ = Münchener Digitalisierungszentrum. It seems likely that you will need to have created a Google account in order to access Google Books items.

Access to post-1864 items on the Google Books and University of Michigan University Library sites appear to be at least partially blocked for residents of some or all non-US nations.