Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 1, pages 1-28
Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 1, pages 29-54
Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 1, pages 79-92
Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 1, pages 93-102
Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 1, pages 103-109
Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 1, pages 110-111
Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 2, pages 133-155
Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 2, pages 156-197
Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 2, pages 216-225
Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 3, pages 267-297
Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 3, pages 344-355
Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 3, pages 366-368
Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 3, pages 369-376
Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 3, pages 377-381
Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 4, pages 383-416
Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 4, pages 417-443
Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 4, pages 495-508
Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 4, pages 509-519
Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 4, pages 519-521
Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 4, pages 522
Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 4, pages 523-539
Published in Journal of the Arnold Arboretum, in 1942, in volume 23, pages 112-155
Published in Journal of the Arnold Arboretum, in 1942, in volume 23, pages 231-232
Published in Journal of the Arnold Arboretum, in 1942, in volume 23, pages 298-343
Published in Journal of the Arnold Arboretum, in 1942, in volume 23, pages 444-463
Published in Journal of the Arnold Arboretum, in 1942, in volume 23, pages 464-478
Published in Journal of the Arnold Arboretum, in 1942, in volume 23, pages 479-494,
Published in Journal of the Arnold Arboretum, in 1942, in volume 23, pages 55-78