Penrose, L.S. <br/><br/>
On the objective study of crowd behavior /    
L.S. Penrose. 
 - London :   H.K. Lewis,   1952. 
 - 73 p. :    ill. ;    22 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Crowds.--------
<br/><br/><label>Dewey Class. No.: </label>301.158 PEN