Published in Gardens' Bulletin, in 1960, in volume 17, issue 3, pages 341-349

Published in Gardens' Bulletin, in 1960, in volume 17, issue 3, pages 350-356

Published in Gardens' Bulletin, in 1960, in volume 17, issue 3, pages 357-360

Published in Gardens' Bulletin, in 1960, in volume 17, issue 3, pages 361-367

Published in Gardens' Bulletin, in 1960, in volume 17, issue 3, pages 368-485

Published in Gardens' Bulletin, in 1960, in volume 17, issue 3, pages 486-497

Published in Gardens' Bulletin, Singapore, in 1960, in volume 18, issue 1, pages 1-64

Published in Gardens' Bulletin Singapore, in 1960, in volume 18, issue 1, pages 65-69