00590nam a2200205 a 450000500170000000800410001702000150005804100080007308200120008110000340009324500580012725000080018526400570019330000320025050000390028265000150032165000130033665000180034965000170036720260717090946.0260717s1977    ii            000 0 eng d  a0632002824  aeng04a616.0791 aRoitt, Ivan M. (Ivan Maurice)10aEssential immunology /cRoitt, Ivan M. (Ivan Maurice)  a3rd 1aEngland :bBlackwell scientific publications,c1977.  axii, 324 p. : ill. ; 24 cm.  aIncludes bibliographies and index. 4aImmunology 4aImmunity 4aImmune System 4aMicrobiology