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Sahm, Daniel F., James A. Karlowsky, Laurie J. Kelly, Ian A. Critchley, Mark E. Jones, Clyde Thornsberry, Yolanda Mauriz, and James Kahn. Need for Annual Surveillance of Antimicrobial Resistance in Streptococcus Pneumoniae in the United States: 2-Year Longitudinal Analysis. American Society for Microbiology, 2001.

Sahm, Daniel F., et al. Need for Annual Surveillance of Antimicrobial Resistance in Streptococcus Pneumoniae in the United States: 2-Year Longitudinal Analysis. American Society for Microbiology, 2001.