BBC Radio 4 - Limelight, The Incident at Ong's Hat, The Incident at Ong's Hat - Episode 1: The Incunabula Papers
Amazon.com: The Incunabula Papers: Ong's Hat and Other Gateways to New Dimensions (Audible Audio Edition): Joseph Matheny, James C. Lewis, Joseph Matheny: Books
Amazon.com: Ong's Hat eBook : Reeves, Steven: Kindle Store
The Fiction of Ong's Hat: Too Good to be False – Tortoise
Ong's Hat and conspiracy theories on Decoder Ring.
Ong's Hat: The Beginning by Matheny, Joseph
A Hat, a Hut, or a Tavern: The Tale of Ong's Hat – NJPineBarrens.com
Ong Family History: A Visit to Ong's Hat, New Jersey