Radio transmitters, r.f. power amplification (The Marconi series covering advances in radio and radar) (Hardcover)
by Victor Owen Stokes (Author)
https://www.amazon.com/Radio-Transmitters-Marconi-V-Stokes/dp/0442080093three more have showed up @ $23 and up, in case anyone wasn't able to get one the last time after only the $100 ones were left.