Trotter, Wilfred,  1872-1939. <br/><br/>
Instincts of the herd in peace and war, 1916-1919 / 
Wilfred Trotter. 
 - London :  T.Fisher Unwin LTD,  1975. 
 - 264 p. ;  22 cm. 
<br/><br/><label>ISBN: </label>0810340909 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social psychology.<br/>World War, 1914-1918.<br/>Crowds.