Does anyone have any good English langauge references (textbook references or journal articles) for linear Born rigid motion, preferrably at an elementary level (i.e. just SR, no tensors). Most of what I could find (I had the opportunity to visit a good library the other day) seemed to be more interested in addressing the issue of what "rigid rotation" might mean, rather than about the basics of linear rigid motion. Born's original is, I believe, in German. This will ultimately wind up in a Wikipedia article with any luck, so I'm looking for something more formal than http://www.mathpages.com/home/kmath422/kmath422.htm.