Fred Zeder article: Fred Zeder: a biography (at https://www.allpar.com/corporate/bios/fred-zeder.html ) First line of the second paragraph: Mach should be March. The sixth paragraph repeats part of the fifth paragraph. You might want to combine them and remove the redundancy. Same with the seventh paragraph about Studebaker's financial troubles. "Had the economy allowed it, Durant — the force behind Chevrolet — may well have mounted yet another successful challenge to the conglomerate he had created and been expelled from." During the Roaring Twenties, the economy allowed it. Lack of sales to justify Durant's constant expansions and acquisitions was the main problem. The main makes during their heyday were Star, Durant, Rugby, Flint and Locomobile, along with Mason Trucks. In 1927, makes started to drop, and by 1929, before the stock market crash, the only makes left were Durant and Rugby.