Published in JOURNAL OF SOUTH AFRICAN BOTANY, in 1950, in volume 16, pages 55-177
Published in Journal of South African botany, in 1950, in volume 16, pages 23-38
Published in JOURNAL OF SOUTH AFRICAN BOTANY, in 1950, in volume 16, pages 3-13
Published in Journal of South African botany, in 1950, in volume 16, pages 39-45
Published in Botanical Survey of South Africa, in 1950, in volume 16, pages 15-22
Published in JOURNAL OF SOUTH AFRICAN BOTANY, in 1950, in volume 16, pages 1-2