Here is an interview with Eric Dollard on the Integratron. He is one of the only ones alive that knows its actual purpose, how it was built, etc. because one of his former jobs included working on it.
His presentation Four Quadrant Representation of Electricity included quite a bit on the Integratron, which you can get here: https://emediapress.com/shop/four-quadrant-representation-electricity/
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https://www.youtube.com/watch?v=fiSYtmJJfe4