Published in Journal of The Arnold Arboretum, in 1960, in volume 41, issue 2, pages 111-140
Published in Journal of The Arnold Arboretum, in 1960, in volume 41, issue 2, pages 141-151
Published in Journal of The Arnold Arboretum, in 1960, in volume 41, issue 2, pages 164-190
Published in Journal of The Arnold Arboretum, in 1960, in volume 41, issue 2, pages 191-196
Published in Journal of The Arnold Arboretum, in 1960, in volume 41, issue 1, pages 73-109
Published in Journal of The Arnold Arboretum, in 1960, in volume 41, issue 4, pages 341-356
Published in Journal of The Arnold Arboretum, in 1960, in volume 41, issue 4, pages 357-390
Published in Journal of The Arnold Arboretum, in 1960, in volume 41, issue 4, pages 391-411
Published in Journal of The Arnold Arboretum, in 1960, in volume 41, issue 4, pages 414-428
Published in Journal of The Arnold Arboretum, in 1960, in volume 41, issue 4, pages 443-445
Published in Journal of The Arnold Arboretum, in 1960, in volume 41, issue 4, pages 446
Published in Journal of The Arnold Arboretum, in 1960, in volume 41, issue 3, pages 231-258
Published in Journal of The Arnold Arboretum, in 1960, in volume 41, issue 3, pages 259-269
Published in Journal of The Arnold Arboretum, in 1960, in volume 41, issue 3, pages 279-286
Published in Journal of The Arnold Arboretum, in 1960, in volume 41, issue 3, pages 287-297
Published in Journal of the Arnold Arboretum, in 1960, in volume 41, pages 197-212
Published in Journal of the Arnold Arboretum, in 1960, in volume 41, pages 213-258
Published in Journal of the Arnold Arboretum, in 1960, in volume 41, pages 1-35
Published in Journal of the Arnold Arboretum, in 1960, in volume 41, pages 47-72
Published in Journal of the Arnold Arboretum, in 1960, in volume 41, pages 270-278