Pitard,Francis F. <br/><br/>
Pierre Gy's sampling theory and sampling practice/2nd ed. 

 - Boca Raton  CRC press  1993 
 - 488p. 
<br/><br/><label>ISBN: </label>0-8493-8917-8 
<br/><br/><label>Subjects--Index Terms: </label>Ores-Sampling and estimation 
<br/><br/><label>Dewey Class. No.: </label>519.243  / PIT