Published in Journal of the Arnold Arboretum, in 1967, in volume 48, pages 245-248
Published in Journal of the Arnold Arboretum, in 1967, in volume 48, pages 30-55
Published in Journal of the Arnold Arboretum, in 1967, in volume 48, pages 159-202
Published in Journal of the Arnold Arboretum, in 1967, in volume 48, pages 56-88
Published in Journal of The Arnold Arboretum, in 1967, in volume 48, issue 1, pages 1-29
Published in Journal of The Arnold Arboretum, in 1967, in volume 48, issue 1, pages 89-100
Published in Journal of The Arnold Arboretum, in 1967, in volume 48, issue 2, pages 105-121
Published in Journal of The Arnold Arboretum, in 1967, in volume 48, issue 2, pages 122-142
Published in Journal of The Arnold Arboretum, in 1967, in volume 48, issue 2, pages 143-151
Published in Journal of The Arnold Arboretum, in 1967, in volume 48, issue 2, pages 152-158
Published in Journal of The Arnold Arboretum, in 1967, in volume 48, issue 3, pages 203-230
Published in Journal of The Arnold Arboretum, in 1967, in volume 48, issue 3, pages 231-240
Published in Journal of The Arnold Arboretum, in 1967, in volume 48, issue 3, pages 241-244
Published in Journal of The Arnold Arboretum, in 1967, in volume 48, issue 3, pages 249-302
Published in Journal of The Arnold Arboretum, in 1967, in volume 48, issue 4, pages 363-430
Published in Journal of The Arnold Arboretum, in 1967, in volume 48, issue 4, pages 431-459
Published in Journal of The Arnold Arboretum, in 1967, in volume 48, issue 4, pages 460-475
Published in Journal of The Arnold Arboretum, in 1967, in volume 48, issue 4, pages 476-545
Published in Journal of The Arnold Arboretum, in 1967, in volume 48, issue 4, pages 546-569