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1
![Analytical chemistry : an introduction : Douglas A. Skoog ... [et. al.].](http://ecx.images-amazon.com/images/I/51W7-uuYMAL._SL110_.jpg)
Skoog, Douglas A.
Saunders College Pub.:Brooks/Cole/Thomson Learning,
2000,
3
McKeague, Charles P.
Saunders College Pub.,
1993,
