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