Published in Journal of the Arnold Arboretum, in 1973, in volume 54, pages 42-93
Published in Journal of the Arnold Arboretum, in 1973, in volume 54, pages 94-104
Published in Journal of the Arnold Arboretum, in 1973, in volume 54, pages 315-321
Published in Journal of the Arnold Arboretum, in 1973, in volume 54, pages 322-327
Published in Journal of the Arnold Arboretum, in 1973, in volume 54, pages 377-411
Published in Journal of the Arnold Arboretum, in 1973, in volume 54, pages 422-434
Published in Journal of the Arnold Arboretum, in 1973, in volume 54, pages 435-470
Published in Journal of the Arnold Arboretum, in 1973, in volume 54, pages 471-473
Published in Journal of The Arnold Arboretum, in 1973, in volume 54, issue 1, pages 105-110
Published in Journal of The Arnold Arboretum, in 1973, in volume 54, issue 1, pages 111-119
Published in Journal of The Arnold Arboretum, in 1973, in volume 54, issue 1, pages 120
Published in Journal of The Arnold Arboretum, in 1973, in volume 54, issue 2, pages 160-227
Published in Journal of The Arnold Arboretum, in 1973, in volume 54, issue 2, pages 293-308
Published in Journal of The Arnold Arboretum, in 1973, in volume 54, issue 2, pages 309-314
Published in Journal of The Arnold Arboretum, in 1973, in volume 54, issue 3, pages 369-376
Published in Journal of The Arnold Arboretum, in 1973, in volume 54, issue 4, pages 419-421