000 00317 a2200121 4500
008 180928b xxu||||| |||| 00| 0
100 _aAPHA
245 _aStandard methods for the examination of water and wastewater /
_cAPHA
250 _a13th ed.
260 _aWashington
_bAPHA
_c1971
300 _a998p.
942 _2ddc
_cBK
999 _c7127
_d7127