Published in Gardens' Bulletin, Singapore, in 1972, in volume 26, issue 1, pages 1-48

Published in Gardens' Bulletin, Singapore, in 1972, in volume 26, issue 1, pages 49-61

Published in Gardens' Bulletin, Singapore, in 1972, in volume 26, issue 1, pages 62

Published in Gardens' Bulletin, Singapore, in 1972, in volume 26, issue 1, pages 63-83

Published in Gardens' Bulletin, Singapore, in 1972, in volume 26, issue 1, pages 85-93

Published in Gardens' Bulletin, Singapore, in 1972, in volume 26, issue 1, pages 95-110

Published in Gardens' Bulletin, Singapore, in 1972, in volume 26, issue 1, pages 111

Published in Gardens' Bulletin, Singapore, in 1972, in volume 26, issue 1, pages 112

Published in Gardens' Bulletin, Singapore, in 1972, in volume 26, issue 1, pages 113-114

Published in Gardens' Bulletin, Singapore, in 1972, in volume 26, issue 1, pages 115-126

Published in Gardens' Bulletin, Singapore, in 1972, in volume 26, issue 1, pages 127-135

Published in Gardens' Bulletin, Singapore, in 1972, in volume 26, issue 1, pages 137-153

Published in Gardens' Bulletin, Singapore, in 1972, in volume 26, issue 1, pages 155-158

Published in Gardens' Bulletin Singapore, in 1972, in volume 26, issue 1, pages 159-194