Published in Journal of the Arnold Arboretum, in 1939, in volume 20, pages 269-277
Published in Journal of the Arnold Arboretum, in 1939, in volume 20, pages 281-287
Published in Journal of the Arnold Arboretum, in 1939, in volume 20, pages 304-316
Published in Journal of the Arnold Arboretum, in 1939, in volume 20, pages 375-402
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 1, pages 1-43
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 1, pages 64-72
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 1, pages 73-74
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 1, pages 75-84
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 1, pages 85-101
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 1, pages 102-103
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 1, pages 104-113
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 1, pages 114-115
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 1, pages 116-136
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 1, pages 137
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 1, pages 138
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 2, pages 139-186
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 2, pages 187-212
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 2, pages 213-215
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 2, pages 216-219
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 2, pages 220-221
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 2, pages 222-224
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 2, pages 225-233
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 2, pages 234-240
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 2, pages 241-244
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 2, pages 245-249
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 2, pages 250-263
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 2, pages 264-268
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 4, pages 403-408