Piddington, Ralph. <br/><br/>
The psychology of laughter :  a study in social adaptation / 
by Ralph Piddington 
 - New york :  Gamut press,  1963. 
 - 224 p. ;  21 cm. 
<br/><br/>includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Laughter<br/>Comic, The
<br/><br/><label>Dewey Class. No.: </label>157.3  / PIP 1963