Published in Botanical Museum Leaflets, Harvard University, in 1969, in volume 22, pages 121-132

Published in Botanical Museum Leaflets, Harvard University, in 1969, in volume 22, pages 165-227

Published in Botanical Museum Leaflets, Harvard University, in 1969, in volume 22, pages 229-240

Published in Botanical Museum Leaflets, Harvard University, in 1969, in volume 22, pages 241-252

Published in Botanical Museum Leaflets, Harvard University, in 1969, in volume 22, pages 253-264

Published in Botanical Museum Leaflets, Harvard University, in 1969, in volume 22, pages 265-271

Published in Botanical Museum Leaflets, Harvard University, in 1969, in volume 22, pages 273-296