Biological control in the tropics : proceedings of the "First Regional Symposium on Biological Control" held at University Pertanian Malaysia, Serdang from 4-6 September, 1985 - Regional Symposium on Biological Control (1st : 1985 : Serdang); M. Y. Hussein (Mohd. Yusof Hussein); A. G. Ibrahim (Abdul Ghani Ibrahim) (Serdang : Universiti Pertanian Malaysia, 1986)