1. Gymnospermophyta;Alvin,1967
2. Studies in Paleobotany;Andrews,1961
3. Observations on Alethopteris grandifolia Newberry and its seeds;Arnold;Contrib. Mus. Paleontol. Univ. Mich.,1935
4. The seeds of Alethopteris, and other pteridosperms from North America;Arnold,1937
5. An Introduction to Paleobotany;Arnold,1947