This series contains project correspondence between Karpovich and the U.S. Army Research Lab in Natick Massachusetts, contract inventory, published articles titled “Effect of footgear upon the energy cost of walking,” “Physiological and kinesiological methods for testing footgear,” “Physiological and kinesiological methods for testing footwear,” and “Study of the human foot in standing and walking,” committee meeting minutes, final reports and research methodology. See also sub-series 5b.