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Dynamic Periodic Table. Web. 09 Dec. 2011. <http://www.ptable.com/>.
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http://www.google.com/imgres?num=10&um=1&hl=en&safe=off&rlz=1C1TSNJ_enUS444US444&biw=1366&bih=667&tbm=isch&tbnid=-KCTBFNcWHVhjM:&imgrefurl=http://www.thingsyoungerthanmccain.com/penicillin/&docid=NUdmOWfqRHdx4M&imgurl=http://www.thingsyoungerthanmccain.com/wp-content/uploads/2008/05/penicillin1-300x254.jpg&w=300&h=254&ei=MpjhTrGZCoSgiQK71a3rDg&zoom=1&iact=hc&vpx=284&vpy=178&dur=810&hovh=203&hovw=240&tx=162&ty=99&sig=111472435440679907162&sqi=2&page=1&tbnh=129&tbnw=152&&ndsp=21&ved=1t:429,r:1,s:0
http://chemicalland21.com/lifescience/phar/PENICILLIN%20V.htm
Dynamic Periodic Table. Web. 09 Dec. 2011. <http://www.ptable.com/>.
"History of Penicillin - Alexander Fleming - John Sheehan - Andrew Moyer." Inventors. Web. 09 Dec. 2011. <http://inventors.about.com/od/pstartinventions/a/Penicillin.htm>
1942, June. "Penicillin." Wikipedia, the Free Encyclopedia. Web. 09 Dec. 2011. <http://en.wikipedia.org/wiki/Penicillin>.
http://www.google.com/imgres?num=10&um=1&hl=en&safe=off&rlz=1C1TSNJ_enUS444US444&biw=1366&bih=667&tbm=isch&tbnid=-KCTBFNcWHVhjM:&imgrefurl=http://www.thingsyoungerthanmccain.com/penicillin/&docid=NUdmOWfqRHdx4M&imgurl=http://www.thingsyoungerthanmccain.com/wp-content/uploads/2008/05/penicillin1-300x254.jpg&w=300&h=254&ei=MpjhTrGZCoSgiQK71a3rDg&zoom=1&iact=hc&vpx=284&vpy=178&dur=810&hovh=203&hovw=240&tx=162&ty=99&sig=111472435440679907162&sqi=2&page=1&tbnh=129&tbnw=152&&ndsp=21&ved=1t:429,r:1,s:0