Published in JOURNAL OF SOUTH AFRICAN BOTANY, in 1952, in volume 18, pages 153-176
Published in Journal of South African botany, in 1952, in volume 18, pages 177-191
Published in Journal of South African botany, in 1952, in volume 18, pages 193-195
Published in JOURNAL OF SOUTH AFRICAN BOTANY, in 1952, in volume 18, pages 101-122
Published in Journal of South African botany, in 1952, in volume 18, pages 123-134
Published in Journal of South African botany, in 1952, in volume 18, pages 135-143
Published in JOURNAL OF SOUTH AFRICAN BOTANY, in 1952, in volume 18, pages 1-100