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 Published by the aid of the David Lydig fund. Effect of light on Etiolation Growth (Plants) Plants QK757 .M3 Memoirs of the New York Botanical Garden https://www.biodiversitylibrary.org/bibliography/50489 https://www.biodiversitylibrary.org/bibliography/12947 5016064 agr03001234 10.5962/bhl.title.12947 U.S. Nat'l Agric. Lib.