Parthasarathy, K. <br/><br/>
Environmental sanitation 
edited by:Jayalakshmi, K

 - Tiruchirappalli  School of Education, Bharathidasan Unive  2007 
 - xi, 284 
<br/><br/>includes annexure and bibliography 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental Health<br/>Sanitation<br/>Environmental education
<br/><br/><label>Dewey Class. No.: </label>333.707 PAR-E