1. The geochemical evolution of groundwater in the Punjab region of Pakistan;Back,1976
2. Hydrogeological conditions and possibilities of further groundwater development in U.T. of Delhi. Minist;Bhatnagar;Agric. Irrig. Chandigarh, Mimeographed Rep.,1979
3. Union Territory of Delhi;Central Board for Prevention and Control of Water Pollution,1979
4. Progress report on systematic geological and hydrogeological investigations in Delhi state and adjacent areas;Chatterji;Geol. Surv. India, Mimeographed Rep.,1961
5. Stable isotopes in precipitation;Dansgaard;Tellus,1964