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LeMasters, Gary S.; Doyle, Douglas J. / Grade A dairy farm well water quality survey
[DNR-058] (1989)

Methods,   pp. 3-10 PDF (430.5 KB)


Page 9

where
Yi,         the concentration for the i"' sample in the jh stratum.
A
_j          the mean concentration for the ji stratum.
nj          the number of sampled elements in the ja stratum.
-     9


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