title: Quasi-Stellar Sources: Variation in the Radio Emission of 3C 273.
abstract: Evidence is presented for the first time for large fractional variations in the radio emission of the quasi-stellar sources 3C 273, 3C 279, and 3C 345, all of which have flat radio spectra at centimeter wavelengths.
authors.forename: W A
authors.initials: WA
authors.lastname: Dent