title: Studies on the origin of the form Ib mammalian DNA-dependent RNA polymerase.
authors.affiliation: Department of Virology, Royal Postgraduate Medical School, Hammersmith Hospital, W.12.,., London, England
authors.forename: C J.
authors.initials: CJ
authors.lastname: Chesterton
authors.forename: P H.W.
authors.initials: PH
authors.lastname: Butterworth