000 00267nam a22001097a 4500
008 160519b xxu||||| |||| 00| 0 eng d
020 _a0632016426
041 _aeng
080 _a574
245 _aEcology of Fresh Waters mand and medium;
_cBrian Moss;
942 _2udc
_cBK
999 _c2249
_d2249