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![[Post New]](/templates/default/images/icon_minipost_new.gif) 6 Mar 2008 17:21:30 IST
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a control is a standard condition which includes all the factor thought to be significant, except one, so that details of its effect may be discovered by comparison.
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Devendra Kumar Shukla
M.Sc physical Chemistry
Currently working in Daswani classes |
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