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The "cover" by @michael_nielsen of @johncarlosbaez book Gauge Fields, Knots and Gravity http://michaelnielsen.org/blog/introduction-to-yang-mills-theories/ …
What a great book! Only a cover of a tiny slice of it, though. And, of course, many other influences. There's a nice book by Cohen-Tannoudji, Dupont-Roc and Grynberg that probably influenced those notes a lot, too, though in a much more diffuse way.
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