Gregory J.C. <br/><br/>
Nature of laughter 

 - London, UK  Kegan Paul, Trench, Trubner and Co. Ltd  1924 
 - 241p. 
<br/><br/><label>Source: </label>Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Abnormal Psychology