De Mel, I. and Sumanasekera, P., 1973. Groundwater Recharge at Yala. Journal of the National Science Foundation of Sri Lanka, 1(2), pp.167–181.

De Mel I, Sumanasekera P. Groundwater Recharge at Yala. Journal of the National Science Foundation of Sri Lanka. 1973;1(2):167–81.

De Mel, I., & Sumanasekera, P. (1973). Groundwater Recharge at Yala. Journal of the National Science Foundation of Sri Lanka, 1(2), 167–181.

1. De Mel I, Sumanasekera P. Groundwater Recharge at Yala. Journal of the National Science Foundation of Sri Lanka. 1973;1(2):167-181.

De Mel I and Sumanasekera P, ‘Groundwater Recharge at Yala’ (1973) 1 Journal of the National Science Foundation of Sri Lanka 167

De Mel, IDT, and P Sumanasekera. 1973. “Groundwater Recharge at Yala”. Journal of the National Science Foundation of Sri Lanka 1 (2): 167–81.

De Mel, IDT, and P Sumanasekera. “Groundwater Recharge at Yala”. Journal of the National Science Foundation of Sri Lanka 1, no. 2 (1973): 167–81.

De Mel, Iand P Sumanasekera. “Groundwater Recharge at Yala”. Journal of the National Science Foundation of Sri Lanka, vol. 1, no. 2, 1973, pp. 167–81.