A comparison of productivity traits of dams, shedders and non-shedders of the group-specific antigen of avian lymphoid leukosis viruses and their progeny [leucose linfoide, galinha, matriz, ovo]
A comparison of productivity traits of dams, shedders and non-shedders of the group-specific antigen of avian lymphoid leukosis viruses and their progeny [lymphoid leukosis, hen, shedder, egg]