?url_ver=Z39.88-2004&rft_id=10.3390%2Frs9040357&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Fritz%2C+S.&rft.aulast=Fritz&rft.aufirst=S.&rft.issue=4&rft.volume=9&rft.date=11+April+2017&rft.issn=2072-4292&rft.atitle=The+Role+of+Citizen+Science+in+Earth+Observation&rft.title=Remote+Sensing&rft.pages=357&rft.genre=article