Tanai, T., & Wolfe, J. A. (1977). Revisions of Ulmus and Zelkova in the Middle and Late Tertiary of western North America. United States Department of the Interior, Geological Survey.
Chicago Style (17th ed.) CitationTanai, Toshimasa, and Jack A. Wolfe. Revisions of Ulmus and Zelkova in the Middle and Late Tertiary of Western North America. Washington: United States Department of the Interior, Geological Survey, 1977.
MLA (9th ed.) CitationTanai, Toshimasa, and Jack A. Wolfe. Revisions of Ulmus and Zelkova in the Middle and Late Tertiary of Western North America. United States Department of the Interior, Geological Survey, 1977.
Warning: These citations may not always be 100% accurate.