Heck, W.W. <br/><br/>
Assessment of air pollution effects on plants 
by W.W. Heck 
 - Ginebra  OMM  1993 
 - 59 p.  28 cm 
 - Technical Note / WMO  55 WMO  556 .
 - Technical Note / WMO WMO .
<br/><br/><label>Subjects--Index Terms: </label>Sector agrario Polucion del aire Meteorologia