Published in Botanical Museum Leaflets, Harvard University, in 1962, in volume 19, pages 215-234

Published in Botanical Museum Leaflets, Harvard University, in 1962, in volume 19, pages 235-286

Published in Botanical Museum Leaflets, Harvard University, in 1962, in volume 20, pages 25-73

Published in Botanical Museum Leaflets, Harvard University, in 1962, in volume 20, pages 75-76

Published in Botanical Museum Leaflets, Harvard University, in 1962, in volume 20, pages 77-84

Published in Botanical Museum Leaflets, Harvard University, in 1962, in volume 20, issue 4, pages 1-24