@book{Statistisches Bundesamt [Federal Statistical Office of Germany]2004,
author = {Statistisches Bundesamt [Federal Statistical Office of Germany]},
title= {Statistisches Jahrbuch 2004 für die Bundesrepublik Deutschland [Statistical yearbook 2004 for the Federal Republic of Germany]},
year = {2004},
address = {Wiesbaden},
publisher = {Statistisches Bundesamt},
}