These pachucos were selling the heck out of the rotary engine concept. This one is better than the later "Let The Experts Answer Your Questions" brochure in that it doesn't rely on spurious quotes to make its points. There are diagrams of the Wankel Cycle, a half page of history, and two pages that lay out arguments in favor. It's a edge-of-your-seat reading but it tells the story succinctly. And the cover has a cool design theme.
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