COLLECTED BY
Collection: UNPAYWALL-PDF-CRAWL-2018-07
Web archive data from a crawl of open access PDF URLs provided by Unpaywall.
TIMESTAMPS
The Wayback Machine - https://web.archive.org/web/20180730082316/http://www.ltas-vis.ulg.ac.be/cmsms/uploads/File/DataSheetSolidATK.pdf