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   title       = {Center for Environmental Systems Research}, 
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   keywords    = {CESR Uni-Kassel},
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@electronic{www.uni-kassel.de,
   title       = {Universitätsbibliothek Kassel - Landesbibliothek und Murhardsche Bibliothek der Stadt Kassel: Startseite}, 
   url         = {http://www.uni-kassel.de/ub},
   biburl      = {https://puma.uni-kassel.de/url/18aea1c5192db1d8bf3046889e7e2ef6/00991368},
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