1. Leaf anatomy of Weichselia based on fusainized material;Alvin;Palaeontology,1974
2. American coal-ball floras;Andrews;Bot. Rev.,1951
3. The petrifaction of wood;Arnold;Mineralogist,1941
4. The petrifaction of wood;Arnold;Mineralogist,1941
5. The fern genus Acrostichum in the Eocene Clarno Formation of Oregon;Arnold;Univ. Mich. Contrib. Mus. Paleontol.,1963