Das, R K Nagar, A L <br/><br/>
Basic statistics  A L Nagar and R K Das 

 - Bombay  Oxford university press  1976 
 - ix,299p.; 23cm. 
<br/><br/><label>ISBN: </label>195607589 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics<br/>Harmonic mean<br/>Statistical population<br/>Statistics