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REFERENCES

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  2. ARAR, E.J. and G.B. COLLINS. 1997. Method 445.0 In vitro determination of Chlorophyll a and Pheophytin a in marine and freshwater algae by fluorescence.
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  9. DOWNING, J. A., G. ANTONIOU, L. BOATWRIGHT, S. CONRAD, D. KENDALL, J. LI, AND A. KALEITA. 2006a. Iowa Lakes Survey: Summer 2005 Scientific Initiatives Report, p. 160. Iowa Department of Natural Resources.
  10. DOWNING, J. A., G. ANTONIOU, J. LI, D. KENDALL, AND S. CONRAD. 2006b. Iowa lakes information system. Iowa State University and Iowa Department of Natural Resources.
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  23. UNITED STATES ENVIRONMENTAL PROTECTION AGENCY. 1993. Determination of Nitrate-Nitrite by Automated Colorimetry. Method 353.2 Revision 2.0.
  24. UNITED STATES ENVIRONMENTAL PROTECTION AGENCY. 1993. Determination of Phosphorus by Semi-Automated Colorimetry. Method 365.1 Revision 2.0.
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