@incollection{Hartmann2008,
  author    = {Frank Hartmann},
  title     = {Visualizing Social Facts: Otto Neurath's ISOTYPE Project},
  booktitle = {European Modernism and the Information Society. Informing the Present, Understanding the Past},
  doi       = {10.25643/bauhaus-universitaet.2269},
  year      = {2008},
}