/14857/1.hassmallThumbnailVersion/EO%20Open%20Science%202017%20-%20Aleksandrov%20et%20al%20-%20Crowdsourcing%20clouds.pdf;/14857/1/EO%20Open%20Science%202017%20-%20Aleksandrov%20et%20al%20-%20Crowdsourcing%20clouds.pdf|/14857/2.hassmallThumbnailVersion/Croudsourcing_EO_Datasets.pdf;/14857/2/Croudsourcing_EO_Datasets.pdf