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
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