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VIEW ARTICLE   |    DOI: 10.1094/MPMI-4-111

Current Review: The Intriguing Viroids and Virusoids: What Is Their Information Content and How Did They Evolve?. Robert H. Symons. Department of Biochemistry, University of Adelaide, Adelaide, S.A. 5000, Australia.. . MPMI 4:111-121. Accepted 10 December 1990. Copyright 1991 The American Phytopathological Society.