>>10476734 pb
Reston VA and USGS blackhats dig, part 2
Sauce
https://twitter.com/USGS/status/1299406482090455043
https://archive.vn/S6xdW
https://www.worldcat.org/title/us-geological-survey-national-center-reston-virginia-status-report/oclc/3038739&referer=brief_results#similar
https://books.google.com/books?id=tS_nyX28P3kC
https://pubs.er.usgs.gov/publication/70160010