Assessment of freshwater quality :   report on the results of the WHO/UNEP programme on health-related environmental monitoring. 

 - [S.l.] :   United Nations Environment Programme :   World Health Organization,   c1988. 
 - 80 p. :   il., mapas. 
<br/><br/> Acima do título: Global Environment Monitoring System. 
<br/><br/><label>LCCN: </label>89980801  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Água--Poluição.<br/>Água--Qualidade
<br/><br/><label>Dewey Class. No.: </label>363.7394