Published in Gardens' Bulletin, Singapore, in 1997, in volume 49, issue 1, pages 1-5

Published in Gardens' Bulletin, Singapore, in 1997, in volume 49, issue 1, pages 7-13

Published in Gardens' Bulletin, Singapore, in 1997, in volume 49, issue 1, pages 15-35

Published in Gardens' Bulletin, Singapore, in 1997, in volume 49, issue 1, pages 37-47

Published in Gardens' Bulletin, Singapore, in 1997, in volume 49, issue 1, pages 49-54

Published in Gardens' Bulletin, Singapore, in 1997, in volume 49, issue 1, pages 55-106

Published in Gardens' Bulletin, Singapore, in 1997, in volume 49, issue 1, pages 107-110

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Published in Gardens' Bulletin, Singapore, in 1997, in volume 49, issue 1, pages 147-159

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Published in Gardens' Bulletin, Singapore, in 1997, in volume 49, issue 1, pages 245-265

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Published in Gardens' Bulletin, Singapore, in 1997, in volume 49, issue 1, pages 353-425