Challenges of the new water policies for the 21 century : proceedings of the seminar on challenges of the new water policies for the 21st century, 29-31 October 2002, Valencia, Spain. : international seminar 'challenges of the new water policies for the 21 century' : Oct 2002, Valencia, Spain.
Challenges of the new water policies for the 21 century : proceedings of the seminar on challenges of the new water policies for the 21st century, 29-31 October 2002, Valencia, Spain. : international seminar 'challenges of the new water policies for the 21 century' : Oct 2002, Valencia, Spain.