Published in Journal of the Arnold Arboretum, in 1961, in volume 42, pages 81-86
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, 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