5Whitfill C E, Haddad E E,Ricks C A, et al. Determi- nation of optimum formulation of a novel infectious bursal disease virus (IBDV) vaccine constructed bymixing bursal disease antibody with IBDV[J]. Avian Disease, 1995,39(4): 687-999.
6Avakian A P,Whitfill C E, Haddad E E, et al. Effica- cy of a infectious bursal disease virus immune com- plex vaccine in SPF chickens[J]. Avian Disease, 1992,36(2): 772-779.
7Haddad E E,Whitfll C E,Ricks C A,et al. Efficacy of a novel infectious bursal disease (IBD) vaccine admin- istered in ovo to SPF chickens[J].Poultry Science, 1993,72(suppl. 1) :4-9.
8Whitfill C E, Haddad E E, Ricks C A, et al. Determi- nation of optimum formulation of a covel infectious bursal disease virus (IBDV) vaccine constructed by mixing bursal disease antibody with IBDV[J]. Avian Disease, 1995,39 (4) : 687-699.
9Haddad E E,Whitfll C E,Avakian A P,et al. Efficacy of a novel infectious bursal disease virus immune com- plex vaccine in broiler chickens [J]. Avian Disease, 1997,41 : 882-889.
10Schat K A, Martins N R, O'Connell P H, et al. Im- mune complex vaccines for chicken in{ectious anemia virus[J].Avian Disease, 2011,55 ( 1 ) : 90-96.
