Flora Malesiana ser. 1, 8: Cyclopaedia of collectors, Supplement II)
of the Singapore Herbarium. In 1970 on study leave at the University of
together with Ang Gek
Choo and Samsuri
bin Ahmad (see there) in 1965; Selangor (15-26 Jan. 1966),
Johore (Nov. 21-26, 1966).