The Engine That Ran on Nothing: The Forbidden Invention of Joseph Papp

The Man Who Challenged Physics: Joseph Papp's Quest for Infinite Energy

Pulser Plasma Engine Core: Recovering the Papp Engine

Joseph Papp (Papp Engine Footage)

How Papp turned a dilapidated building into The Public Theater | Joe Papp | American Masters | PBS

Suppressed Energy Technology Breakthrough - The Joe Papp Engine

SSE Talk: The Mystery of Joe Papp’s Noble Gas Engine - Ryan S. Wood