"anthrax." Encyclopædia Britannica.
2007. Encyclopædia Britannica Online School Edition.
16
Dec.
2007 <http://school.eb.com/eb/article-9007792>.
"anthrax." Encyclopædia Britannica.
2007. Encyclopædia Britannica Online School Edition.
16
Dec.
2007 <http://school.eb.com/eb/article-253243>.
"anthrax." Encyclopædia Britannica.
2007. Encyclopædia Britannica Online School Edition.
16
Dec.
2007 <http://school.eb.com/eb/article-253242>.
"Anthrax." World of Scientific Discovery. Ed. Kimberley A. McGrath and Bridget Travers. Online ed. Detroit: Thomson Gale, 2007. Student Resource Center - Gold. Thomson Gale. St Andrews Episcopal School - Austin. 16 Dec. 2007 <http://find.galegroup.com/srcx/infomark.do?&contentSet=GSRC&type=retrieve&tabID=T001&prodId=SRC-1&docId=EJ1648500039&source=gale&srcprod=SRCG &userGroupName=aust33615&version=1.0>.
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