Arnold, C. A., & Daugherty, L. H. (1963). The fern genus Acrostichum in the Eocene Clarno formation of Oregon. Museum of Paleontology, University of Michigan.
Chicago Style (17th ed.) CitationArnold, Chester A., and Lyman Harry Daugherty. The Fern Genus Acrostichum in the Eocene Clarno Formation of Oregon. Ann Arbor: Museum of Paleontology, University of Michigan, 1963.
MLA (9th ed.) CitationArnold, Chester A., and Lyman Harry Daugherty. The Fern Genus Acrostichum in the Eocene Clarno Formation of Oregon. Museum of Paleontology, University of Michigan, 1963.
Warning: These citations may not always be 100% accurate.