00426nam a2200121Ia 4500008004100000082001900041100001700060245006000077260003000137300001000167630001800177650010900195211109s9999||||xx |||||||||||||| ||und|| a628.161bTRI.R aTrivedy, R K 0aChemical And Biochemical Methods Water Polution Studies bEnviro MediaaIndiac1986 a251p. xGeneral Stack aWater--AnalysisvWater chemistryxSanitary & municipal engineeringEngineering & allied operationsZoology