00457cam a2200157La 4500020001600000082001600016100001800032245003300050250001200083260002900095300002300124650002800147654004300175700002100218856006000239  a0585384215   a616.33bTHA  aTham, Tony CK00aGastrointestinal emergencies  a1st ed.  aLondon bBMJ Booksc2000  axi, 249 p. bill.  0aGastrointestinal system  aGastroenterology                      1 aCollins, John SA4 uhttp://www.columbia.edu/cgi-bin/cul/resolve?clio4250351