Thornton, W.E.2018-03-132018-03-13Unknownhttp://hdl.handle.net/2152.3/6773This document is a letter written by W.E. Thornton to C.F. Sawin outlining cooperation challenges with the treadmill research project.treadmillDr. William E. ThorntonresearchexercisecooperationC.F. Sawin