Published in Journal of The Arnold Arboretum, in 1980, in volume 61, issue 1, pages 1-40

Published in Journal of The Arnold Arboretum, in 1980, in volume 61, issue 1, pages 95-105

Published in Journal of The Arnold Arboretum, in 1980, in volume 61, issue 1, pages 113-115

Published in Journal of The Arnold Arboretum, in 1980, in volume 61, issue 3, pages 425-699

Published in Journal of The Arnold Arboretum, in 1980, in volume 61, issue 4, pages 723-748

Published in Journal of The Arnold Arboretum, in 1980, in volume 61, issue 4, pages 749-764

Published in Journal of The Arnold Arboretum, in 1980, in volume 61, issue 4, pages 765-770

Published in Journal of The Arnold Arboretum, in 1980, in volume 61, issue 4, pages 771-783

Published in Journal of the Arnold Arboretum, in 1980, in volume 61, pages 41-94

Published in Journal of the Arnold Arboretum, in 1980, in volume 61, pages 107-111

Published in Journal of the Arnold Arboretum, in 1980, in volume 61, pages 117-699

Published in Journal of the Arnold Arboretum, in 1980, in volume 61, pages 701-722