@book{SchmidtWolckeRenk2005,
  author    = {Wilhelm Richard Schmidt and Irmtraud Dietlinde Wolcke-Renk},
  title     = {Deutsch-S{\"u}dwest-Afrika : Fotos aus der Kolonialzeit 1884 - 1918},
  isbn      = {3-89702-346-6},
  year      = {2005},
}