Procedures for water and wastewater analysis :  with colorimeter calibrations for popular Bausch and Lomb Spectrophotomers. 

 - Loveland :  Hach Co,  1984. 
 - ill. ;  28 cm. 
<br/><br/> Open access. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage--Analysis.<br/>Wastewaters.