@book{47009,
	author = {Haile, Abraham Mehari},
	title = {A tradition in transition :},
	publisher = {Taylor & Francis ,},
	year = {2007},
	address = {Leiden, The Netherlands :},
	note = {Dissertation submitted in fulfilment of requirements of the Academic Board of Wageningen University and the Academic Board of the UNESCO-IHE Institute for Water Education for the Degree of Doctor to be defended in public on Friday, 27 April 2007 at 15:00 hrs in Delft, the Netherlands}
}