It is entitled 'Degenerate Players in the Work' They dont mention groups by name, but if former members read the descriptions, they will very likely recognize thier groups!
William Patterson, a scholar of Gurdjieff work has written a book describing the genesis of 3 counterfeits, and has a chapter on Burton.
Burton's teacher, Alex Francis Horn and Sharon Gans created a
Forum:
"Cults," Sects, and "New Religious Movements"