Wasn't Grinsell the man for Barrows? I'd have thought some of his stuff should be useful for this.
Yes it would be but possibly a bit dated now, although on saying that, I don't suppose there has been a huge amount of modern dating done on many of the barrows has there. Grinsell has an actual chapter on the type and chronology of barrows in his Ancient Burial Mounds of England but I've not read it lately.