00271nam a2200097Ia 4500080001900000100001100019245008800030260002600118300001000144583001900154  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