Berry, Charles M.D.2018-05-232018-05-231970-01-12http://hdl.handle.net/2152.3/8797A NASA memorandum written by Dr. Charles Berry regarding the Impact of a 23.5 hour day during flight and AAP Medical Experiments.AAP Medical ExperimentsmemorandumDr. Charles BerryDr. William ThorntonSpace MedicineImpact 23.5 hour dayNASA