Published in Journal of the Arnold Arboretum, in 1955, in volume 36, pages 52-109

Published in Journal of the Arnold Arboretum, in 1955, in volume 36, pages 209-239

Published in Journal of the Arnold Arboretum, in 1955, in volume 36, pages 397-401

Published in Journal of The Arnold Arboretum, in 1955, in volume 36, issue 1, pages 110-114

Published in Journal of The Arnold Arboretum, in 1955, in volume 36, issue 1, pages 115-117

Published in Journal of The Arnold Arboretum, in 1955, in volume 36, issue 4, pages 431

Published in Journal of The Arnold Arboretum, in 1955, in volume 36, issue 2/3, pages 165-170

Published in Journal of The Arnold Arboretum, in 1955, in volume 36, issue 2/3, pages 305-317