1. The genus Callixylon from the Upper Devonian of central and western New York;Arnold;Pap. Mich. Acad. Sci.,1930
2. The identity of Archaeopteris and Callixylon;Beck;Brittonia,1960
3. Eddya sullivanensis, gen. et sp. nov., a plant of gymnospermic morphology from the Upper Devonian of New York;Beck;Palaeontographica, B,1967
4. The appearance of gymnospermous structure;Beck;Bot. Rev. Camb. Philos. Soc.,1970
5. On the anatomy and morphology of lateral branch systems of Archaeopteris;Beck;Am. J. Bot.,1971