000 00530nam a22001817a 4500
005 20251108170732.0
008 250721s1990 xx 000 0 eng d
082 1 4 _aR/543/OFF
100 1 _aHelrich, Kenneth
_eProd.
245 1 0 _aOfficial methods of analysis of the association of official analytical chemists /
250 _a15th
264 1 _aVirginia :
_bAssociation of official Analytical chemists , Inc.,
_c1990.
300 _a2vol
650 1 7 _aChemistry
650 1 7 _aAnalytic
942 _2ddc
_cREF
999 _c47774
_d47774