2018-12-192018-12-191982-04-20https://hdl.handle.net/2152.3/11029A NASA memorandum for Changes in Treadmill for STS-4 and Subsequent FlightsDr. William ThorntonresearchexercisetreadmillSTS-4NASAmemorandumTreadmill_71-81_1_ChangesSTS-4TreadmillUse_04.20.82