This is a two-part series of articles that ran in the Saturday Evening Post in 1925. They are an autobiographical overview Oldfield wrote with the assistance of William Sturm. I judge some of this material to be inaccurate, not because Oldfield embellished (not that I put it past him), but because I think he simply forgot things.
One of the most intriguing figures of 1930's European Grand Prix Racing, Bernd Rosemeyer is memorialized with video and other content at this link. An odd but informative analysis of his accident is also available.