Published in Gardens' Bulletin, Singapore, in 1987, in volume 40, issue 1, pages 1-14

Published in Gardens' Bulletin, Singapore, in 1987, in volume 40, issue 1, pages 15-30

Published in Gardens' Bulletin, Singapore, in 1987, in volume 40, issue 1, pages 31-34

Published in Gardens' Bulletin, Singapore, in 1987, in volume 40, issue 1, pages 35-36

Published in Gardens' Bulletin, Singapore, in 1987, in volume 40, issue 1, pages 37-43

Published in Gardens' Bulletin, Singapore, in 1987, in volume 40, issue 1, pages 45-76

Published in Gardens' Bulletin, Singapore, in 1987, in volume 40, issue 2, pages 77-102

Published in Gardens' Bulletin, Singapore, in 1987, in volume 40, issue 2, pages 103-112

Published in Gardens' Bulletin, Singapore, in 1987, in volume 40, issue 2, pages 113-132

Published in Gardens' Bulletin, Singapore, in 1987, in volume 40, issue 2, pages 133-137

Published in Gardens' Bulletin, Singapore, in 1987, in volume 40, issue 2, pages 139-144

Published in Gardens' Bulletin, Singapore, in 1987, in volume 40, issue 2, pages 145-152