You can read it. You could also read it as early as this review in the winter of 1982-83. The article begins on page ten with the relevant mention on page 11.

If you scroll to page 50-51 of the pdf that was declassified, you’ll see a transit slip (the missing page 48 in the book is because it’s a blank page in the book following a section that ends on an odd number, like the missing pages 18 and 52). I’m guessing that piece of paper was the relevant document and it was found being used as a bookmark in this book. Scroll further to page 56 of the pdf, to see the supplementary reading and that’s what I’m basing my skepticism on. The Wikipedia page is just a helpful summary.