Published in Journal of the Arnold Arboretum, in 1948, in volume 29, pages 77-89

Published in Journal of the Arnold Arboretum, in 1948, in volume 29, pages 117-122

Published in Journal of the Arnold Arboretum, in 1948, in volume 29, pages 123-151

Published in Journal of the Arnold Arboretum, in 1948, in volume 29, pages 210-211

Published in Journal of the Arnold Arboretum, in 1948, in volume 29, pages 227-241

Published in Journal of the Arnold Arboretum, in 1948, in volume 29, pages 257-392

Published in Journal of the Arnold Arboretum, in 1948, in volume 29, pages 393-413

Published in Journal of The Arnold Arboretum, in 1948, in volume 29, issue 1, pages 1-48

Published in Journal of The Arnold Arboretum, in 1948, in volume 29, issue 1, pages 49-63

Published in Journal of The Arnold Arboretum, in 1948, in volume 29, issue 1, pages 64-76

Published in Journal of The Arnold Arboretum, in 1948, in volume 29, issue 1, pages 90-102

Published in Journal of The Arnold Arboretum, in 1948, in volume 29, issue 1, pages 103-110

Published in Journal of The Arnold Arboretum, in 1948, in volume 29, issue 2, pages 169-185

Published in Journal of The Arnold Arboretum, in 1948, in volume 29, issue 2, pages 186-192

Published in Journal of The Arnold Arboretum, in 1948, in volume 29, issue 2, pages 193-197

Published in Journal of The Arnold Arboretum, in 1948, in volume 29, issue 2, pages 215

Published in Journal of The Arnold Arboretum, in 1948, in volume 29, issue 3, pages 217-226

Published in Journal of The Arnold Arboretum, in 1948, in volume 29, issue 4, pages 321-392

Published in Journal of the Arnold Arboretum, in 1948, in volume 30, pages 85-110