?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Heesterbeek%2C+J.A.P.&rft.aulast=Heesterbeek&rft.aufirst=J.A.P.&rft.date=1996&rft.isbn=0-521-45339-9&rft.title=The+saturating+contact+rate+in+epidemic+models&rft.btitle=Models+for+Infectious+Human+Diseases%3A+Their+Structure+and+Relation+to+Data&rft.genre=bookitem