SCIENCE
links
http://www.scribd.com/doc/34170094/Ng-Li-Xian-9-1r7
https://spreadsheets.google.com/ccckey=0Au6iIB5BT8Q0dG1QbEZaZFZIQk9HRFRFMFcxTVBQUWc&hl=en&authkey
http://mywebspiration.com/view/496492a231ad
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