00618cam a22001814a 4500008004100000020001500041020001800056040000800074050002200082245011200104260007700216300001900293505001700312518001500329650004100344650002000385700003100405010910s2002 enka b 001 0 eng  a0521771579 a9780521771573 aSDU00aQH96.8bM744 200200aMonitoring ecological impacts :bconcepts and practice in flowing waters /cBarbara J. Downes ... [et al.]. aCambridge, UK ;aNew York, NY, USA :bCambridge University Press,c2002. a434 p. :bill. aHKBU library aYT2025 M10 0aWater quality biological assessment. 0aStream ecology.1 aDownes, Barbara J.,d1958-