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, pages 88-96
Published in Journal of the Arnold Arboretum, in 1938, in volume 19, pages 117-128
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 248-263
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, 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, 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