Curtis, David. <br/><br/>
Learn while you sleep :  theory and practice of sleep learning. 

 - New York :  Libra Publishers,  1960. 
 - 126 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental suggestion.<br/>Subconsciousness.<br/>Therapeutics, Suggestive.
<br/><br/><label>Dewey Class. No.: </label>154.4  / CUR/L