'Dan Margulis writes mainly about colour correction using Photoshop - a different subject from color management'.
True that. Not to split hairs, but if one isn't able to correct color correctly, color management is either pointless or unmanageable. Just an aside: 8% of the male population is color blind. Dan's book is a good starting place, especially if you are concerned about preparing files for SWOP. I don't know where the line for color correction ends and color management begins. From a layman's standpoint, they are not mutually exclusive.
Disclaimer: I am not a color scientist. As a former FX designer, analog cinema era, and a sole proprietor, now retired, of a successful business specializing in technical and creative photography, I think color correction is intertwined with color management. ...of course, that's just my opinion.