7. Bibliography (not used in report)\
Campbell, N. and J. Reece. (2002) Biology, Sixth Edition. San Francisco, CA.
H. B. et al. (2013). Ecological Indicators. Assessment of Lemna Gibba L. (duckweed) as a Potential Ecological Indicator for Contaminated Aquatic Ecosystem by Boron Mine Effluent, 29, 538-548.
R., M.K. (2007). Environmental Pollution and Toxicology. Retrieved February 1, 2016, from http://site.ebrary.com.proxy.lib.sg/lib/singaporenatlib/docDetail.action?docID=10415303&p00=bioindicators
Tsuda, T., Yorifuji, T., Takao, S., Miryai, M., & Babazono, A.. (2009). Minamata Disease: Catastrophic Poisoning Due to a Failed Public Health Response. Journal of Public Health Policy,30(1), 54–67. Retrieved from http://www.jstor.org.proxy.lib.sg/stable/40207223
Apfel, A. (2016). How Does Duckweed Reproduce? Retrieved January 13, 2016, from http://www.ehow.com/how-does_5262856_duckweed-reproduce.html
Girard, L. (2016). What Affects the Growth of Duckweed? Retrieved January 14, 2016, from http://www.olllie.com/about_6510510_affects-growth-duckweed_.html
Growing Duckweed. (2016). Retrieved March 04, 2016, from http://gardenpool.org/online-classes/growing-duckweed
Kirchhoff, H. (2016). What Does Salt Water Do to a Plant? Retrieved January 21, 2016, from http://www.ehow.com/info_12091247_salt-water-plant.html