Thornton, William E. (William Edgar), 1929-2016-03-312016-03-311972http://hdl.handle.net/2152.3/632Graph depicting the left arm and leg volumes during weightlessness and recovery for the SL-4 mission "PLT" (Simulation Pilot, Bo Bobko).Skylab Program.Space medicine.Weightlessness--Physiological effect.Space flight--Physiological effect.Image