Berry, E T <br/><br/>
Sleep--a necessity or an indulgence?  [electronic resource] 

 -  Israel journal of medical sciences  Aug 1985 
 - 706-7 p.  digital 
<br/><br/> Publication Type: Letter 
<br/><br/><label>ISSN: </label>0021-2180 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Humans<br/>Sleep--physiology