Thornton, William E. (William Edgar), 1929-2016-03-182016-03-181972http://hdl.handle.net/2152.3/614Graph depicting the variations in SMMD (Specimen Mass Measurement Device) calibration points over the course of the 56-day SMEAT simulation Skylab missions.Space medicine.Space flight--Physiological effect.Weightlessness--Physiological effect.Skylab Program.Image