00282nam a2200109Ia 450000500170000000800410001708200150005810000190007324500330009226000390012530000080016420260224041042.0260224s9999||||xx |||||||||||||| ||und||  a627.52 PER  aPereira, L.S.  0aWater and the environment :   aNew York: E & FN Spon, 1998.c1998  a470