Published in Journal of the Arnold Arboretum, in 1949, in volume 30, pages 75-84
Published in Journal of the Arnold Arboretum, in 1949, in volume 30, pages 111-138
Published in Journal of the Arnold Arboretum, in 1949, in volume 30, pages 166-186
Published in Journal of the Arnold Arboretum, in 1949, in volume 30, pages 233-344
Published in Journal of the Arnold Arboretum, in 1949, in volume 30, pages 348-387
Published in Journal of the Arnold Arboretum, in 1949, in volume 30, pages 388-424
Published in Journal of the Arnold Arboretum, in 1949, in volume 30, pages 425-432
Published in Journal of the Arnold Arboretum, in 1949, in volume 30, pages 433-442
Published in Journal of The Arnold Arboretum, in 1949, in volume 30, issue 1, pages 1-9
Published in Journal of The Arnold Arboretum, in 1949, in volume 30, issue 1, pages 10-38
Published in Journal of The Arnold Arboretum, in 1949, in volume 30, issue 1, pages 39-63
Published in Journal of The Arnold Arboretum, in 1949, in volume 30, issue 1, pages 64-70
Published in Journal of The Arnold Arboretum, in 1949, in volume 30, issue 1, pages 71-74
Published in Journal of The Arnold Arboretum, in 1949, in volume 30, issue 2, pages 139-165
Published in Journal of The Arnold Arboretum, in 1949, in volume 30, issue 2, pages 187-210
Published in Journal of The Arnold Arboretum, in 1949, in volume 30, issue 3, pages 211-226
Published in Journal of The Arnold Arboretum, in 1949, in volume 30, issue 3, pages 227-230
Published in Journal of The Arnold Arboretum, in 1949, in volume 30, issue 3, pages 231-232
Published in Journal of The Arnold Arboretum, in 1949, in volume 30, issue 4, pages 345-347
Published in Journal of The Arnold Arboretum, in 1949, in volume 30, issue 4, pages 443-449
Published in Journal of The Arnold Arboretum, in 1949, in volume 30, issue 4, pages 450-453
Published in Journal of The Arnold Arboretum, in 1949, in volume 30, issue 4, pages 454-455
Published in Journal of The Arnold Arboretum, in 1949, in volume 30, issue 4, pages 456