00282nam a2200109Ia 450000500170000008000180001724500570003526000260009230000180011858300180013665000180015420260716043627.0  a17.05.05 W927  aWorld water balance and water resources of the earth  bUNESCOaParisFRc1978  a663 p. : maps  c11/7/05kJOYD  aWATER BALANCE