Media type: E-Article Title: Complex Paleozoic Filicales in the Evolutionary Radiation of Ferns Contributor: Rothwell, Gar W. Published: Wiley, 1987 Published in: American Journal of Botany, 74 (1987) 3, Seite 458 Language: Not determined DOI: 10.2307/2443822 ISSN: 0002-9122 Origination: Footnote: