Measurement of sleep.
D000328:Adult; D000654:Amobarbital / Q000494:pharmacology*; D002986:Clinical Trials as Topic; D006801:Humans; D008297:Male; D008702:Methaqualone / Q000494:pharmacology*; D008875:Middle Aged; D010919:Placebos; D011581:Psychological Tests; D012631:Secobarbital / Q000494:pharmacology*; D012890:Sleep / Q000187:drug effects*
D010919:Placebos; D012631:Secobarbital; D008702:Methaqualone; D000654:Amobarbital