000			004140000a22001570004500
245			_aStream ecology and self purification : an introduction for wastewater and water specialists
100			_aSpellman, Frank R.
260			_aLancaster _bTechnomic _c1996
300			_a133p. : ill.
020			_a1566763770
080			_a574 _bS7
650			_aECOLOGY
650			_aWATER
041			_aEN
942			_cBK _01
999			_c69759 _d69759