000 00314nam a22001217a 4500
008 170401b xxu||||| |||| 00| 0 eng d
041 _aeng
080 _a574
100 _a9
101 _aSHM
245 _aA GUIDE TO THE COMMON DIATOMS AT WATER POLLUTION SURVEILLANCE SYSTEM STATIONS
_cWEBER, C.I
942 _2udc
_cBK
999 _c9443
_d9443