@article{721344,
      author = {Haas, Charles N., and Rose, Joan B., and Gerba, Charles  P.,},
      url = {http://library.usi.edu/record/721344},
      title = {Quantitative microbial risk assessment [electronic  resource] /},
      recid = {721344},
      pages = {1 online resource (441 pages) :},
}