Perera, K.R. <br/><br/>
වෙළඳ පරිපාලනය 
= Welada paripalanya 


 - Colombo :  Gunasena,  1962 
 - 261.;  22cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technology
<br/><br/><label>Dewey Class. No.: </label>650  / PER