http://en.wikipedia.org/wiki/Treasury_security

http://www.treasurydirect.gov/indiv/products/prod_tbills_glance.htm

http://www.treasurydirect.gov/

http://www.investopedia.com/terms/t/treasurybill.asp

http://www.investopedia.com/university/moneymarket/moneymarket2.asp

http://collegesavings.about.com/od/typesofinvestments/a/Treasury_T_Bill.htm

http://www.frbsf.org/education/activities/drecon/2000/0012.html

http://www.ehow.com/how_4717112_save-money-grow.html

http://www.riskglossary.com/articles/treasury_bill.htm

http://www.fonerbooks.com/t-bills.htm