Published in JOURNAL OF SOUTH AFRICAN BOTANY, in 1957, in volume 23, pages 1-12

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Published in Journal of South African botany, in 1957, in volume 23, pages 15-17

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Published in Journal of South African botany, in 1957, in volume 23, pages 19-37

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Published in Journal of South African botany, in 1957, in volume 23, pages 43-63

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Published in Journal of South African botany, in 1957, in volume 23, pages 65-73

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Published in JOURNAL OF SOUTH AFRICAN BOTANY, in 1957, in volume 23, pages 75-102

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Published in Journal of South African Botany, in 1957, in volume 23, pages 103-104

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Published in Journal of South African botany, in 1957, in volume 23, pages 105-109

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Published in Journal of South African botany, in 1957, in volume 23, pages 111-119

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Published in Journal of South African botany, in 1957, in volume 23, pages 121

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Published in JOURNAL OF SOUTH AFRICAN BOTANY, in 1957, in volume 23, pages 123-125

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Published in Journal of South African botany, in 1957, in volume 23, pages 127-137

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Published in Journal of South African botany, in 1957, in volume 23, pages 139-149

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