References

Scientific Research Credit (For sources with direct scientific relevance including published papers)

Gibson, James, and Associates. "Nutrient Deficiencies in Production of Annual Floral Crops." Electronic Data Information
    Source. University of Florida IFAS Extension, Apr. 2007. Web. 28 Mar. 2012. <http://edis.ifas.ufl.edu/ep325>.
Required
    nutrients for sunflowers and the deficiency patterns for each nutrient.
Prasad, M.N.V. "SUNFLOWER (Helinathus Annuus L.) - A POTENTIAL CROP FOR ENVIRONMENTAL INDUSTRY."  
    DoiSerbia. National Library of Serbia, 15 May 2007. Web. 10 Mar. 2012. <http://www.doiserbia.nb.rs/img/doi/1018-
    1806/2007/1018-18060746167P.pdf>.
Metabolization of toxins in a hydroponic system with sunflowers.

Yong, P., and J.L Schnoor. "PHYTOREMDIATION OF LEAD USING SUNFLOWERS AND EDTA." 
    Http://www.engg.ksu.edu/. Kansas State University, 22 May 1997. Web. 19 Mar. 2012. 
    <http://www.engg.ksu.edu/hsrc/97abstracts/p51.html>.
Proof of absorption of lead in hydroponics: growth observed in system.


Website Credit (For containing information that I derived my experiment and research from)
"Sunflower Hydroponic Gardening" http://www.hydroponicgrowing.co/hydroponics/sunflower-hydroponic-gardening/
"Sunflowers For Lead" http://www.metrojacksonville.com/article/2010-jun-sunflowers-for-lead-spider-plants-for-arsenic
"Phytoremediation: Using Plants to Clean Soil" http://www.mhhe.com/biosci/pae/botany/botany_map/articles/article_10.html
"Perchlorate" http://water.epa.gov/drink/contaminants/unregulated/perchlorate.cfm
"Wastewater Treatment and Water Reclamation" http://www.lacsd.org/about/wastewater_facilities/moresanj/default.asp
"Perchlorate in Drinking Water" http://www.cdph.ca.gov/certlic/drinkingwater/pages/Perchlorate.aspx
"History of Perchlorate in California Drinking Water" http://www.cdph.ca.gov/certlic/drinkingwater/Pages/Perchloratehistory.aspx
"EPA to Regulate Toxic Chemicals in Drinking Water" http://articles.latimes.com/2011/feb/02/nation/la-na-water-epa-20110203
"Water Pollution Spreading In the Valley" http://www.dailynews.com/news/ci_15432294
"CRS Report For Congress-Perchlorate Contamination of Drinking Water: Regulatory Issues and Legislative Actions" http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA473462

"Sunflower Crop Diseases" http://www.ag.ndsu.edu/pubs/plantsci/crops/pp533w-4.htm#sunflower

"How to Foliar Feed Your Plants" http://www.4hydroponics.com/FAQfoliar.asp

"Sunflowers Used to Clean Up Radiation" http://www.japantoday.com/category/national/view/sunflowers-used-to-clean-up-radiation


Interview References:
Irma Reyes, Head of the Conservatory at the Huntington Library and Botanical Gardens. Interviewed March 8, 2012.