WHO expert committee on biological standardization  forty ninth report 
World Health Organization. 
 - Geneva  World Health Organization  2000 
 - vi, 106p., 23cm 
 - (WHO technical report series, 897). .
<br/><br/><label>ISBN: </label>92-4-120897-x. 
<br/><br/><label>Dewey Class. No.: </label>574.0218  / W83W