RT Journal Article SR Electronic(1) A1 Isaacs, A. A1 Donald, Heather B.YR 1955 T1 Particle Counts of Haemagglutinating Viruses JF Microbiology, VO 12 IS 2 SP 241 OP 247 DO https://doi.org/10.1099/00221287-12-2-241 PB Microbiology Society, SN 1465-2080, AB The electron microscope was used to make particle counts of the viruses of Newcastle disease of fowls, fowl plague, mumps and influenza C. Two counting techniques previously described were also used, and correlations with simultaneous measurements of haemagglutination and infectivity were made., UL https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-12-2-241