Published in Journal of the Arnold Arboretum, in 1970, in volume 51, pages 1-17

Published in Journal of the Arnold Arboretum, in 1970, in volume 51, pages 18-40

Published in Journal of the Arnold Arboretum, in 1970, in volume 51, pages 129-131

Published in Journal of the Arnold Arboretum, in 1970, in volume 51, pages 185-203

Published in Journal of the Arnold Arboretum, in 1970, in volume 51, pages 204-220

Published in Journal of the Arnold Arboretum, in 1970, in volume 51, pages 241-246

Published in Journal of the Arnold Arboretum, in 1970, in volume 51, pages 251-254

Published in Journal of the Arnold Arboretum, in 1970, in volume 51, pages 257-309

Published in Journal of the Arnold Arboretum, in 1970, in volume 51, pages 310-366

Published in Journal of the Arnold Arboretum, in 1970, in volume 51, pages 427-430

Published in Journal of the Arnold Arboretum, in 1970, in volume 51, pages 431-462

Published in Journal of the Arnold Arboretum, in 1970, in volume 51, pages 492-498

Published in Journal of the Arnold Arboretum, in 1970, in volume 51, pages 521-528

Published in Journal of the Arnold Arboretum, in 1970, in volume 51, pages 529-523

Published in Journal of The Arnold Arboretum, in 1970, in volume 51, issue 1, pages 41-55

Published in Journal of The Arnold Arboretum, in 1970, in volume 51, issue 1, pages 56-69

Published in Journal of The Arnold Arboretum, in 1970, in volume 51, issue 1, pages 70-88

Published in Journal of The Arnold Arboretum, in 1970, in volume 51, issue 1, pages 114-128

Published in Journal of The Arnold Arboretum, in 1970, in volume 51, issue 2, pages 133-184

Published in Journal of The Arnold Arboretum, in 1970, in volume 51, issue 2, pages 221-227

Published in Journal of The Arnold Arboretum, in 1970, in volume 51, issue 2, pages 228-240

Published in Journal of The Arnold Arboretum, in 1970, in volume 51, issue 2, pages 247-250

Published in Journal of The Arnold Arboretum, in 1970, in volume 51, issue 3, pages 367-402