00411nam a2200133Ia 450000500170000008000180001710000270003524501260006226000260018830000150021458300190022994200120024899900170026020260716043112.0  a17.05.05 H889  aHufschmidt, Maynard M.  aApproaches to integrated water resources management in humid tropical and arid and semiarid zones in developing countries  bUNESCOaParisFRc1991  aix, 161 p.  c3/7/00kM2LMGR  cMmH889  c40341d40341