Biblio

Socio-Economic Units, Kerala -Trivandrum, IN and Ernakulam, I. N. N. E. E. R. I. -, “Rural water supply through development of natural springs”. Kochi Zonal Laboratory, National Environmental Engineering Research Institute, Ernakulam, India, p. 41 p. : fig., photogr., tab., 1994.

Pazhakulam Social Service Society -Adur, IN, PASSS, “Rural water supply programme through development of natural springs : report on the project”. Pazhakulam Social Service Society (PASSS), Adur, India, p. 86 p. : maps, photogr., tab., 1993.