. Elements of ecology. Ecology. SUMMER 1921 WINTER 1919-21. SUMMER 1926 WINTER 1924-26. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Clarke, George L. (George Leonard), 1905-. New York, Wiley

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Keywords: ., bookcentury1900, bookpublishernewyorkwiley, booksubjectecology