Parthasarathy , K. <br/><br/>
Environmental Sanitation / 
By K Parthasarathy, S Jayalakshmi. 
 - 1 st,2007. 
 - Tiruchirappalli :  School of education /BharathidasUniversity , Khajamalai campus, Tiruchirappalli,  1974. 
 - xi,B33p. ;  00 cm. 
<br/><br/><label>Dewey Class. No.: </label>628  / PAR