Published in Botanical Museum Leaflets, Harvard University, in 1963, in volume 20, pages 93-116

Published in Botanical Museum Leaflets, Harvard University, in 1963, in volume 20, pages 117-160

Published in Botanical Museum Leaflets, Harvard University, in 1963, in volume 20, pages 161-193

Published in Botanical Museum Leaflets, Harvard University, in 1963, in volume 20, pages 194-212

Published in Botanical Museum Leaflets, Harvard University, in 1963, in volume 20, pages 213-219

Published in Botanical Museum Leaflets, Harvard University, in 1963, in volume 20, pages 221-224