A study on surface water quality of Noyil Vattamala Karai and Ponnani drainage Basins / 
Central Ground Water Board, Ministry of Agriculture and Irrigation, Government of India ; compiled by A. A. Gupta, V. P. Sharma and K. C. B. Raju 
 - Coimbatore :  The Author,  1980 
 - 70 p. ;  33 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water-supply--India<br/>Water-supply, Agricultural--Quality<br/>Water quality--India
<br/><br/><label>Subjects--Index Terms: </label>Noyil Vattamala Karai Basins 
<br/><br/><label>Dewey Class. No.: </label>551.49