1. Estimation of recharge to the phreatic aquifers of Lower Maner Basin by using the tritium injection method;Athavale;Natl. Geophys. Res. Inst., Hyderabad, Tech. Rep. No. GH9-NH1,1978
2. Groundwater recharge in wstern Uttar Pradesh;Datta,1973
3. Moisture movement measured by isotope tagging;Munnich,1968
4. Use of nuclear techniques for the determination of groundwater recharge rates;Munnich,1968