Microsoft Academic Graph public corpus (Feb 2016) PDF URLs, filtered to remove large sites (pubmed, citeseerx, arxiv) and already-crawled URLs.
TIMESTAMPS
The Wayback Machine - https://web.archive.org/web/20170809055352/https://www.aaafoundation.org/sites/default/files/DrunkDriving-SeekingAdditionalSolutions.pdf
