@book{https://doi.org/10.22028/d291-27212,<br/><span class="tab"></span>
  doi = {10.22028/D291-27212},<br/><span class="tab"></span>
  url = {https://publikationen.sulb.uni-saarland.de/handle/20.500.11880/27125},<br/><span class="tab"></span>
  author = {Greve,<br/><span class="tab"></span> Werner and Wentura,<br/><span class="tab"></span> Dirk},<br/><span class="tab"></span>
  keywords = {150,<br/><span class="tab"></span> 300},<br/><span class="tab"></span>
  language = {de},<br/><span class="tab"></span>
  title = {Wissenschaftliche Beobachtung: eine Einführung},<br/><span class="tab"></span>
  publisher = {Universität des Saarlandes},<br/><span class="tab"></span>
  year = {1997}
}