00300nam a2200109Ia 450000500170000008000190001710000110003624500880004726000260013530000100016158300190017120260716043035.0  a17.05.05 W3285  aUNESCO  aWater-related issues and problems of the humid tropics and other warm humid regions  bUNESCOaParisFRc1989  a33 p.  c3/7/00kM2LMGR