Robinson, E.A.G.. <br/><br/>
The Structure of Competitive Industry /  

 - 1st ed /  
 - London :   Nisbet & Co. Ltd. ,   1981 
 - p179 :  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics
<br/><br/><label>Dewey Class. No.: </label>X8(A):516  / H5;1