The Jessup Dimension

Does anyone know the answer to this? Just recently, Andy Colvin republished the book, The Jessup Dimension by Anna Genzlinger, about Morris Jessup and the Philadelphia Experiment.

The original was published in 1981 by Gray Barker's Saucerian Press.

However, I have a different copy, which is basically a photocopy of Barker's original (minus the original cover; see the photos).

Was this third version I have also published by Barker or by someone else?

There's no other publisher name etc on this copy. I've had this for around 25 years, but can't remember where I got it from.