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Helen Nina Tappan
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Journal Article
Published: 01 November 1957
Journal of Paleontology (1957) 31 (6): 1109–1137.
Journal Article
Published: 01 January 1950
Journal of Paleontology (1950) 24 (1): 39–60.
Journal Article
Published: 01 May 1949
Journal of Paleontology (1949) 23 (3): 245–266.
Journal Article
Published: 01 May 1946
Journal of Paleontology (1946) 20 (3): 238–258.
Journal Article
Published: 01 November 1944
Journal of Paleontology (1944) 18 (6): 560.
Journal Article
Published: 01 September 1943
Journal of Paleontology (1943) 17 (5): 476–517.
Journal Article
Published: 01 July 1941
Journal of Paleontology (1941) 15 (4): 359–361.
Journal Article
Published: 01 March 1940
Journal of Paleontology (1940) 14 (2): 93–126.