00380fam a2200133 a 4500020001500000082001700015100002300032245005100055250001200106260004100118300003900159654002400198700002400222  a817225213700a616.025bAGG  aAggarwal , Praveen00aPrinciples and practice of emergency medicine   a4th ed.  aBaltimore bWilliams & Wilkinsc1999  axliii, 1936 p. bill. (some col.)   a Emergency Medicine1 aSchwartz, George R.