000 00313nam a22001337a 4500
020 _a013503129X
082 _a577.6
_bAND/IN
100 _aAndrews,William A
245 _aInvestigating Aquatic Ecosystems
260 _aOntario
_bPrentice-Hall
_c1987
300 _a342p.
700 _aMcEwan,Sandra J
942 _cBK
999 _c11256
_d11256