00516nam a22001457a 450000500170000000600040001700700040002100800040002504000090002905000160003824502350005426000270028930000250031665000290034120170726161531.0000000000  aUOEL  aTD194.5bI4  aThe impact of large water projects on the environment :bproceedings of an International Symposium convened by Unesco and UNEP and organised in cooperation with IIASA  and IAHS 21-31 October 1986 Unesco Headquarters, Paris /cUNEP  aPasis :bUNEP,cc1990.  axiii, 568 p. :bill.  aEnvironmental Technology