Published in Gardens' Bulletin Singapore, in 1965, in volume 21, issue 1, pages 1-186

Published in Gardens' Bulletin Singapore, in 1965, in volume 21, issue 2, pages 187-193

Published in Gardens' Bulletin Singapore, in 1965, in volume 21, issue 2, pages 195-208

Published in Gardens' Bulletin Singapore, in 1965, in volume 21, issue 2, pages 209-211

Published in Gardens' Bulletin Singapore, in 1965, in volume 21, issue 2, pages 213-214

Published in Gardens' Bulletin Singapore, in 1965, in volume 21, issue 2, pages 215-257