GSIS Special Issue: Crowdsourcing for Urban Geoinformatics.
Geo-Spatial Information Science (GSIS), Volume 23, Issue 3. Taylor & Francis.
Guest Editors:
Hongchao Fan, Rene Westerholt, João Porto de Albuquerque, Bernd Resch and Alexander Zipf
TOC:
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 Pages: 257-271 
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