Slayton, Donald2018-04-042018-04-041971-08-18http://hdl.handle.net/2152.3/7599A letter to Dr. Berry from D. Slayton, indicating that "we do not concur with your statement" on crew sleep on the lunar sleep, written in the document, Apollo 15 Mission 5-Day Report.crew sleepDr. Charles BerrymemorandumNASADonald SlaytonSpace Medicine