A monograph of azaleas; rhododendron subgenus Anthodendron Wilson, Ernest Henry, 1876-1930 creator Rehder, Alfred, 1863-1949 contributor text book Cambridge The University Press 1921 1921
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ENG The azaleas of the old world, by E. H. Wilson.--The azaleas of North America, by A. Rehder. Azaleas QK495.R47 W5 Publications of the Arnold Arboretum, no. 9 https://www.biodiversitylibrary.org/bibliography/55595 5426307 21010414 10.5962/bhl.title.55595