Published in Journal of the Arnold Arboretum, in 1972, in volume 53, pages 26-51

Published in Journal of the Arnold Arboretum, in 1972, in volume 53, pages 76-100

Published in Journal of the Arnold Arboretum, in 1972, in volume 53, pages 101-112

Published in Journal of the Arnold Arboretum, in 1972, in volume 53, pages 128-139

Published in Journal of the Arnold Arboretum, in 1972, in volume 53, pages 182-201

Published in Journal of the Arnold Arboretum, in 1972, in volume 53, pages 226-233

Published in Journal of the Arnold Arboretum, in 1972, in volume 53, pages 234-272

Published in Journal of the Arnold Arboretum, in 1972, in volume 53, pages 403-408

Published in Journal of the Arnold Arboretum, in 1972, in volume 53, pages 531-552

Published in Journal of the Arnold Arboretum, in 1972, in volume 53, pages 553-557

Published in Journal of The Arnold Arboretum, in 1972, in volume 53, issue 1, pages 1-25

Published in Journal of The Arnold Arboretum, in 1972, in volume 53, issue 1, pages 52-75

Published in Journal of The Arnold Arboretum, in 1972, in volume 53, issue 1, pages 113-127

Published in Journal of The Arnold Arboretum, in 1972, in volume 53, issue 2, pages 141-181

Published in Journal of The Arnold Arboretum, in 1972, in volume 53, issue 2, pages 202-215

Published in Journal of The Arnold Arboretum, in 1972, in volume 53, issue 2, pages 216-225

Published in Journal of The Arnold Arboretum, in 1972, in volume 53, issue 3, pages 273-311

Published in Journal of The Arnold Arboretum, in 1972, in volume 53, issue 3, pages 312-335

Published in Journal of The Arnold Arboretum, in 1972, in volume 53, issue 3, pages 336-363

Published in Journal of The Arnold Arboretum, in 1972, in volume 53, issue 3, pages 364-385

Published in Journal of The Arnold Arboretum, in 1972, in volume 53, issue 3, pages 386-389

Published in Journal of The Arnold Arboretum, in 1972, in volume 53, issue 3, pages 390-398

Published in Journal of The Arnold Arboretum, in 1972, in volume 53, issue 4, pages 499-514

Published in Journal of The Arnold Arboretum, in 1972, in volume 53, issue 4, pages 515-530

Published in Journal of The Arnold Arboretum, in 1972, in volume 53, issue 4, pages 558-568