I am a fan of the older books on rotating electrical machines, the ones which were published before 1970 and basically gave you all the information you needed in half the size and half the pages of a modern text. There are numerous books on AC Machine design from this era that will have several sections on Alternator design, to the point that they'll cover the materials to use in the machine and mechanical design considerations, such as cooling, bearings and casing. But for the life of me, I've never found a book during this period that has at least a chapter on generator excitation system design, in particular the control side.

Could someone recommend a book from this era that covers this topic? I'd not a fan of 21st century books that cover this topic as they all seem to be a complex mess of Laplace Transforms.