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