title: The inactivation of tomato bushy stunt virus by heating and freezing: Addendum: Examination of bushy stunt virus in the ultracentrifuge.
authors.affiliation: Rothamsted Experimental Station, Harpenden, Herts.
authors.forename: F C
authors.initials: FC
authors.lastname: Bawden
authors.forename: N W
authors.initials: NW
authors.lastname: Pirie