1. Abbas, B. M., 1987. Agreement on the Ganges. In M. Ali, G. E. Radosevich & A. Ali Khan (eds), Water Resources Policy for Asia. A. A. Balkema Publishers, Boston: 517?538.
2. Ahmad, A., 1986. The distribution and population of crocodiles in the provinces of Sind and Baluchistan (Pakistan). J. Bombay Nat. Hist. Soc. 83: 220?223.
3. Ahmad, M. & S. Sonoda, 1979. The ecology of freshwater elasmobranch of the Indragiri River, Riau. Oseanol. Indones. 12: 13?19. (In Indonesian)
4. Ajmal, M. & Razi-Ud-Din, 1988. Studies on the pollution of Hindon River and Kali Nadi (India). In R. K. Trivedy, (ed.), Ecology and Pollution of Indian Rivers. Ashish Publishing House, New Delhi: 87?112.
5. Natural Resources Research;K. Aki,1974