00329nam 2202683 45000010005000000030023000050050009000280080041000370820011000781000011000892600025001003000015001252450057001402683StarLibrary Marc Built20180420201711 ||||| |||||||||||amh  a333.91 aUNESCO bParis: UNESCO c1978 a663p: 25cm aworld water balance and water resources of the earth