Botanical abstracts - Board of Control of Botanical Abstracts. (Williams & Wilkins Co, 1920)

Grasses of Southern Africa - Russell, G. E. Gibbs, L. Watson, M. Koekemoer, L. Smook, N. P. Barker, H. M. Anderson, M. J. Dallwitz (1990)

Grasses of Southern Africa - Russell, G. E. Gibbs, L. Watson, M. Koekemoer, L. Smook, N. P. Barker, H. M. Anderson, M. J. Dallwitz (1990)

Journal of South African botany - National Botanic Gardens of South Africa. (National Botanic Gardens of South Africa, 1938)

Journal of South African botany - National Botanic Gardens of South Africa. (National Botanic Gardens of South Africa, 1938)

Just's Botanischer Jahresbericht - Just, Johann Leopold, 1841 -1891 (Gebruder Borntraeger, 1918)

Memoirs of the New York Botanical Garden - New York Botanical Garden (The Garden, 1953)

Memoirs of the New York Botanical Garden - New York Botanical Garden (The Garden, 1954)