@book{1985-Koster-Elan0,
  author		= "Koster, C.H.A. and Weide, Th.P. van der",
  title			= "{Manual for the Elan0 Programming Environment for personal computers}",
  month			= "March",
  publisher		= "Educaboek",
  year			= "1985",
  class			= "Book"
}