@incollection{BLACK,
  address = {London},
  author = {Black, Jeremy},
  interhash = {891c1a2f9231d9760bcf6f9c6bc121e1},
  intrahash = {be13167b9b4ed69a422a923ee8b3c124},
  pages = {9-51},
  title = {Geschichte der Landkarte. Von der Antike bis zur Gegenwart},
  year = 2005
}

@book{hair2006multivariate,
  author = {Hair, Joseph F. and Black, William C. and Babin, Barry J. and Anderson, Rolph E.},
  interhash = {aa7e924c7ed64801ab814448f17402db},
  intrahash = {ffeaff51fa312872b95bbe1bad79e031},
  note = {No.4},
  title = {Multivariate Data Analysis},
  volume = 7,
  year = 2006
}