Missouri Botanical Garden.; Garden, Missouri Botanical; Botany, Henry Shaw School of (1978). Annals of the Missouri Botanical Garden. Vol. v.65 (1978). St. Louis: Missouri Botanical Garden Press.
Arnold Arboretum.; Arboretum, Arnold (1919). Journal of the Arnold Arboretum. Vol. v.1-2 (1919-1922). Cambridge, Mass.: Arnold Arboretum, Harvard University [etc.]
