Gy, Pierre M. <br/><br/>
Sampling of particulate materials; theory and practice   

 - 2nd. 
 - Amsterdam  Elsevier  1982 
 - xvii, 431p. Index 
 - Developments in Geomathematics   v.4 .
<br/><br/>  
<br/><br/><label>Dewey Class. No.: </label>519.52  / G996.SP