Pigou, A.C.. <br/><br/>
A Study in Public Finance /  

 - Third Rev. Ed. /  
 - London :   Macmillan & Co. Ltd.. 
 - p285 :  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics
<br/><br/><label>Dewey Class. No.: </label>X7  / K0;4