Suggesting three books by Joel Burnett. The first one (this recommendation) is based on his dissertation. It is considered to be the most comprehensive and up-to-date inquiry into the word ':elohhiym available at this time. That should be enough to get it into the production cycle. I've owned a hard copy for a while, but I'm just getting into it. Dan McClellan has recommended this book a couple of different times, fwiw.
