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Protection of shade trees in cities and towns (1900)
[New Haven] : Connecticut Agricultural Experiment Station · leaf 40
Fig. 6.—The Elm Scale on Twigs. PLATE IV … Fig. 9.—Work of Elm Borer.(After Felt.) Fig. 7.—Adult Maple Borers.(After Felt.)Trees · Ornamental trees
Internet Archive · University of Connecticut Library · Public Domain Mark 1.0. Free to use for anything.
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