Quite frankly, there are virtually no references for Smith & Wesson.
Standard Catalog of Smith & Wesson is the best overview of the company's products, and the most recent.
Best company history, with something of a product overview, is Roy Jinks work from the 1970s.
Jinks and Neal did one in the 1950s that's a very good reference, as well, but only if you're willing to pay several hundred dollars for an original.