Ager, D. V. (1963). Principles of paleoecology: An introduction to the study of how and where animals and plants lived in the past. Mc Graw-Hill.
Citace podle Chicago (17th ed.)Ager, Derek Victor. Principles of Paleoecology: An Introduction to the Study of How and Where Animals and Plants Lived in the Past. New York: Mc Graw-Hill, 1963.
Citace podle MLA (9th ed.)Ager, Derek Victor. Principles of Paleoecology: An Introduction to the Study of How and Where Animals and Plants Lived in the Past. Mc Graw-Hill, 1963.
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