The influence of light and darkness upon growth and development MacDougal, Daniel Trembly, 1865-1958 creator text book New York 1903 1903
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ENG Effect of light on Etiolation Growth (Plants) Plants QK757 M22 Memoirs of the New York Botanical Garden, v. 2 https://www.biodiversitylibrary.org/bibliography/46070 10.5962/bhl.title.46070 OTU