@book{Badde.1998,
  address = {Bonn},
  author = {Badde, Karl J.},
  interhash = {bbce02eb0774941c538b70f1bb86b1d0},
  intrahash = {247cfec47af9c1e3fd9edcd0ac5e35a2},
  isbn = {3925144110},
  publisher = {Internat. WHERE+HOW Verl},
  title = {The international who's who in distance learning},
  year = 1998
}