@article{Comber2016, author = "Alexis Comber and Peter Mooney and Ross S. Purves and Duccio Rocchini and Ariane Walz", title = "{Crowdsourcing: It Matters Who the Crowd Are. The Impacts of between Group Variations in Recording Land Cover}", year = "2016", month = "9", url = "https://plos.figshare.com/articles/dataset/Crowdsourcing_It_Matters_Who_the_Crowd_Are_The_Impacts_of_between_Group_Variations_in_Recording_Land_Cover/3882774", doi = "10.1371/journal.pone.0158329" }