Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 1, pages 1-9
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 1, pages 107-109
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 1, pages 110-111
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 1, pages 112-113
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 2, pages 115-143
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 2, pages 144-156
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 2, pages 157-164
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 2, pages 165-203
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 2, pages 219-262
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 3, pages 263-275
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 3, pages 276-294
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 3, pages 334-346
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 4, pages 397-415
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 4, pages 416-425
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 4, pages 426-429
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 4, pages 437-441
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 4, pages 442-446
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 4, pages 447-463
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 4, pages 464-467
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 4, pages 468
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 4, pages 469-477
Published in Journal of the Arnold Arboretum, in 1961, in volume 42, pages 87-95
Published in Journal of the Arnold Arboretum, in 1961, in volume 42, pages 295-320
Published in Journal of the Arnold Arboretum, in 1961, in volume 42, pages 321-333
Published in Journal of the Arnold Arboretum, in 1961, in volume 42, pages 373-396
Published in Journal of the Arnold Arboretum, in 1961, in volume 42, pages 430-435
Published in Journal of the Arnold Arboretum, in 1961, in volume 42, pages 81-86