Spellman, Frank R. <br/><br/>
Mathematics manual for water and wastewater treatment plant operators / 
Frank R. Spellman 
 - Boca Raton, Fla. :  CRC Press,  2004 
 - 689 p. :  ill. ;  26 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>1566706750 (pbk. : acid-free paper)  RM388.10 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water--Purification--Mathematics<br/>Water quality management--Mathematics<br/>Water--Purification--Problems, exercises, etc.<br/>Water quality management--Problems, exercises, etc.<br/>Sewage--Purification--Mathematics<br/>Sewage disposal--Mathematics<br/>Sewage--Purification--Problems, exercises, etc.<br/>Sewage disposal--Problems, exercises, etc.