SM 4500-NH3 Nitrogen Ammonia 2017 / 
Standard Methods For the Examination of Water and Wastewater 
 - 23a. ed 
 - Denver :  Standard Methods For the Examination of Water and Wastewater,  2017 
 - 10 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>NORMAS TÉCNICAS<br/>SM 4500-NH3 Nitrogen Ammonia 2017<br/>AGUAS RESIDUALES