Thornton, William E. (William Edgar), 1929-2016-03-312016-03-311972http://hdl.handle.net/2152.3/630Graph depicting the left arm and leg volumes during weightlessness and recovery for the SL-4 mission "SPT" (Simulation Support, Dr. William Thornton).Weightlessness--Physiological effect.Space flight--Physiological effect.Skylab Program.Space medicine.Image