We will describe a protoype digital library of the journal ``Archiv der Mathematik". Recent issues are linked to retro-digitized back issues. The resulting digital library is:
a) retrievable,
b) searchable
Referenced journal citations are recognized and their bibliographic data including ISSN (International Standard Serial Number) are produced in XML format. These bibliographic data allow the integration of the retrodigitized texts into the digital library database MILESS of the IT Center of Essen University.
Another main ingredient of our retrodigitization program system if the multivalent document format (MVD) developed by T. Phelps (Berkeley).
In this lecture also the recognition problem of mathematical formulas will be addressed and full credit will be given to the work of Professsor Okamoto's study group (University of Nagano).