Its task is to collect , archive , document and record bibliographically all German and German language publications from 1913 on , foreign publications about Germany , translations of German works , and the works of German-speaking emigrants published abroad between 1933 and 1945 , and to make them available to the public . Its task , unique in Germany , is to collect , permanently archive , comprehensively document and record bibliographically all German and German-language publications from 1913 on , foreign publications about Germany , translations of German works , and the works of German-speaking emigrants published abroad between 1933 and 1945 , and to make them available to the public .