Programme & abstracts : 4th Malaysian Microbiology Symposium, 17-19th Augut, 1981, Universiti Kebangsaan Malaysia, Bangi - Malaysian Microbiology Symposium 1981 : Bangi, Selangor).; Muhammad Omar Mohammad Omar.; Simposium Mikrobiologi Malaysia 1981 : Bangi, Selangor). (Bangi, Selangor : Persatuan Mikrobiologi Malaysia, 1981)