APA
(1980). Basic data of exploratory and observation tubewells in Vattamalai karai basin and in Noyil basin outside the study basins: SIDA Assisted ground water project in Noyil, Ponnani and Amaravati River basins, Tamil Nadu and Kerala Report 1:13. Coimbatore: Ministry of agriculture and irrigation.
Chicago
1980. Basic data of exploratory and observation tubewells in Vattamalai karai basin and in Noyil basin outside the study basins: SIDA Assisted ground water project in Noyil, Ponnani and Amaravati River basins, Tamil Nadu and Kerala Report 1:13. Coimbatore: Ministry of agriculture and irrigation.
Harvard
(1980). Basic data of exploratory and observation tubewells in Vattamalai karai basin and in Noyil basin outside the study basins: SIDA Assisted ground water project in Noyil, Ponnani and Amaravati River basins, Tamil Nadu and Kerala Report 1:13. Coimbatore: Ministry of agriculture and irrigation.
MLA
Basic data of exploratory and observation tubewells in Vattamalai karai basin and in Noyil basin outside the study basins: SIDA Assisted ground water project in Noyil, Ponnani and Amaravati River basins, Tamil Nadu and Kerala Report 1:13. Coimbatore: Ministry of agriculture and irrigation. 1980.