Code of practice for design and construction of septic tanks  Part II large installations/1 st rev. 

 - 1st rev. 
 - New Delhi  Indian standards institution  1971 
<br/><br/><label>Subjects--Index Terms: </label>IS:2470(Part II)-1971 
<br/><br/><label>Dewey Class. No.: </label>628.352.001.3