SIMPSON, G. G. (1964). Life of the past: An introductionto paleontology. YaleUniversity.
Tohutoru Kātū Chicago (17th ed.)SIMPSON, George Gaylord. Life of the Past: An Introductionto Paleontology. London: YaleUniversity, 1964.
Tohutoro MLA (9th ed.)SIMPSON, George Gaylord. Life of the Past: An Introductionto Paleontology. YaleUniversity, 1964.
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