AMERICAN 300.504 The American Pediatric Society and The Society for Pediatric Research : abstracts and program outline May 2-6, 1997 Friday -Tuesday Washington Convention Center Washington, DC. - Sprinfield : Williams and Wilkins, 1997. - XLI, 389 s. ; 28 cm. - (Pediatric Research, 0031-3998 ; vol.41,nr4,pt.2suppl)