author = { Shaffer, Larry Menke, Kurt },

title = { State of QGIS },

publisher = {FOSS4G, Open Source Geospatial Foundation (OSGeo)},

year = {2017},

abstract = {Audiovisuelles Material},

address = { [Erscheinungsort nicht ermittelbar] },

url = { http://slubdd.de/katalog?TN_libero_mab2 }