I checked this book out of the library recently, and, as with most all of Berto's books, it is most certainly a book any vintage drivetrain/brakeset user, or enthuthiast, must have on hand - and when they sell at Amazon.com, lightly used, for $5-15, you cannot afford NOT to have this book on hand.
It is, unquestionably, the best reference guide I've ever found regarding mid '70s-late 1980's componentry. Freewheels and early Shimano UG cassettes are discussed in considerable depth, both friction and indexed derailer systems are addressed, the minute details of the chains available during the era, shifting patterns, various cranksets, et cetera - complete with the most extensively detailed charts you'd ever want.
One cannot begin to explain everything that is in this book - suffice it to say that he couldn't have written a book any better for what was to become the future vintage lightweight enthuthiasts of today.
Amazon.com has a few copies of it available, new ($79 ) and used ($6-20). If you don't already have it, get it - and if you don't, well, you're missing out: