Thorpy, Michael J. <br/><br/>
The Encyclopedia of sleep and sleep disorders 
Michael J. Thorpy and Jan Yager. 
 - 2nd.ed.,updated and revised. 
 - New York  Facts on File  Inc. 
 - xxxvii,314p.; 26cm. 
<br/><br/><label>ISBN: </label>816040893 
<br/><br/><label>Dewey Class. No.: </label>616.849803  / T45E