Pollard, A., Scheifele, D., & Rosenstein, N. (2001). Epidemiology of meningococcal disease in north america.
Chicago-čujuhus (17. p.)Pollard, A., D. Scheifele, juo N. Rosenstein. Epidemiology of Meningococcal Disease in North America. 2001.
MLA-čujuhus (9. p.)Pollard, A., et al. Epidemiology of Meningococcal Disease in North America. 2001.
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