Great footnotes! This is a nice, simple way to amalgamate these resources. One suggestion: a page reference, not just the chapter, would have been nice. Were page numbers left out in case of revision changes? If so, I'd add them in regardless... even if those resources do get edited, the probability of an edit resulting in a page change is less than 100% (and likely far less I would think). Even if they do get edited onto a new page, the odds that the new page reference is off by more than 1 is vanishingly small. The utility of having a page reference (and not just a chapter reference), even on the off chance that the page reference is off by 1, outweighs the 'risk' of having a page reference not being quite where it was at the time of writing.