Published in Journal of the Arnold Arboretum, in 1938, in volume 19, pages 21-70
Published in Journal of The Arnold Arboretum, in 1938, in volume 19, issue 3, pages 191-247
Published in Journal of The Arnold Arboretum, in 1938, in volume 19, issue 3, pages 279-281
Published in Journal of The Arnold Arboretum, in 1938, in volume 19, issue 3, pages 282-290
Published in Journal of The Arnold Arboretum, in 1938, in volume 19, issue 4, pages 291-375
Published in Journal of The Arnold Arboretum, in 1938, in volume 19, issue 4, pages 446-457
Published in Journal of The Arnold Arboretum, in 1938, in volume 19, issue 4, pages 457-460
Published in Journal of The Arnold Arboretum, in 1938, in volume 19, issue 4, pages 461
Published in Journal of The Arnold Arboretum, in 1938, in volume 19, issue 4, pages 463-482
Published in Journal of The Arnold Arboretum, in 1938, in volume 19, issue 1, pages 71-87
Published in Journal of The Arnold Arboretum, in 1938, in volume 19, issue 1, pages 97-98
Published in Journal of The Arnold Arboretum, in 1938, in volume 19, issue 2, pages 99-116
Published in Journal of The Arnold Arboretum, in 1938, in volume 19, issue 2, pages 129-133
Published in Journal of The Arnold Arboretum, in 1938, in volume 19, issue 2, pages 134-148
Published in Journal of The Arnold Arboretum, in 1938, in volume 19, issue 2, pages 149-152
Published in Journal of The Arnold Arboretum, in 1938, in volume 19, issue 2, pages 163-173
Published in Journal of the Arnold Arboretum, in 1938, in volume 19, pages 264-278
Published in Journal of the Arnold Arboretum, in 1938, in volume 19, pages 376-401
Published in Journal of the Arnold Arboretum, in 1938, in volume 19, pages 248-263
Published in Journal of the Arnold Arboretum, in 1938, in volume 19, pages 153-157
Published in Journal of the Arnold Arboretum, in 1938, in volume 19, pages 88-96
Published in Journal of the Arnold Arboretum, in 1938, in volume 19, pages 117-128