Williams, Gertrude <br/><br/>
The price of social security :   The problem of labour mobility /  
Gertrude Williams. 
 - London :   Kegan, Paul, Trench, Trubner & Co.,  1945. 
 - 199 p. 
 - International Library of Sociology and Social Reconstruction .
<br/><br/><label>Clasificación de Dewey: </label>IDI 0718