Characterisation and utilisation of roselle, Hibiscus sabdariffa L. - Mohd Ghazali, Hasanah; Yusof, Salmah; Osman, Azizah; Abdul Rahman, Russly; Alimon, Abdul Razak; Syed Muhammad, Sharifah Kharidah; Abd. Hamid, Azizah; Mat Hashim, Dzulkifly (The Research Unit, Universiti Putra Malaysia, 1999)