RT Journal Article SR Electronic(1) A1 Harling, R YR 2001 T1 More anthrax letters and cases in the United States JF Weekly releases (1997–2007) VO 5 IS 47 SP 2060 OP DO https://doi.org/10.2807/esw.05.47.02060-en UL https://www.eurosurveillance.org/content/10.2807/esw.05.47.02060-en