Physical Traces: http://www.cufos.org/books/Physical_Traces.pdf
UFO Reports Involving Vehicle Interference: http://www.cufos.org/books/UFO_REPORTS_INVOLVING_VEHICLE_INTERFERENCE.pdf
A Catalogue of 200 Type-I UFO Events
in Spain and Portugal: http://cufos.org/books/Catalogue_of_200_Type_I_UFO_Events_in_Spain_and_Portugal.pdf
Declassified New Zealand UFO documents: https://archive.org/details/NewZealandUFO/AIR-1080-6-897-Volume-1-1978-1981/page/n3/mode/2up
Danish UFO Files: https://archive.org/details/DanishUFOFiles
Brazilian UFO Files: https://archive.org/details/BrazilianUFOFiles
THE HYNEK UFO REPORT: http://www.cufos.org/books/The_Hynek_UFO_Report.pdf
Secondary Effects:
http://www.cufos.org/books/A_Study_of_Secondary_Effects-An_Unpublished_Manuscript_of_UFO_E-M_Cases.pdf
Electro-Magnetic Effects: https://majesticdocuments.com/pdf/nicap-electromagneticeffects_june60.pdf
E-M EFFECTS: SURFACE VEHICLES: https://nicap.org/cat3-1964on.htm
UFO reports in the UK: https://www.gov.uk/government/publications/ufo-reports-in-the-uk
Canada’s UFOs: The search for the unknown: https://www.bac-lac.gc.ca/eng/discover/unusual/ufo/Pages/default.aspx
French UFO Files: https://archive.org/details/FrenchUFOFiles/nt8_enquete_79_06