%0 Journal Article %T An improved single-radial-immunodiffusion technique for the assay of influenza haemagglutinin antigen: application for potency determinations of inactivated whole virus and subunit vaccines. %A Wood, J M %A Schild, G C %A Newman, R W %A Seagroatt, V %J Journal of biological standardization %V 5 %N 3 %P 237-247 %@ 0092-1157 %D 1977-10-14 %~ DeepDyve