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100 _aIS: 6491-1972
245 _aMethod of sampling fly ash
260 _aISI
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_c1972
300 _a10p.
942 _cBK
999 _c6518
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856 _uhttp://14.139.222.13:80/cgi-bin/koha/opac-detail.pl?biblionumber=6518
_yhttp://14.139.222.13:80/cgi-bin/koha/opac-detail.pl?biblionumber=6518