Kulshreshtha, S.N (1998). „A Global Outlook for Water Resources to the Year 2025”. Water Resources Management. 12 (3): 167—184. S2CID152322295. doi:10.1023/A:1007957229865.
Kulshreshtha, S.N (1998). „A Global Outlook for Water Resources to the Year 2025”. Water Resources Management. 12 (3): 167—184. S2CID152322295. doi:10.1023/A:1007957229865.