Found two places Ebay from 75 on up, wallyworld for 52-jeeze, that is a rip off. I have a copy. To be honest, read the whole thing from cover to cover and he mostly likes very expensive equipment. PM me, I think 20 might be fair-may take a day or so to actually find it-but it is here and not out on loan. Did not learn that much, but then I started in audio in 1970, car stereo installer, home audio salespuke, etc.
Jerry