Mahoo, Henry F.; Mkoga, Zakaria J.; Kasele, Sydney Stephen; Igbadun, Henry E.; Hatibu, Nuhu; Rao, Karuturi P. C.; Lankford, Bruce(International Water Management Institute, Colombo, Sri Lanka, 2008)
Saeed, Muhammad Mazhar; Ashraf, Muhammad; Asghar, Muhammad Nadeem; Bruen, Michael; Shafique, Muhammad Siddique(International Water Management Institute, Colombo, Sri Lanka, 2002)
Asghar, Muhammad Nadeem; Ahmad, Shahid; Shafique, Muhammad Siddique; Kahlown, Muhammad Akram(International Water Management Institute, Colombo, Sri Lanka, 2002)