title: On Nucleon-Antinucleon Symmetry in Cosmology.
abstract: It has been suggested that cosmological models should embody an initial nucleon-antinucleon symmetry and that the present ratio of nucleons to antinucleons is the result of a statistical fluctuation. Simple arguments are presented for evolutionary models which appear to rule out this possibility in the development of the universe.
authors.forename: R A
authors.initials: RA
authors.lastname: Alpher
authors.forename: R
authors.initials: R
authors.lastname: Herman