The biology and culture of tilapias : proceedings of the International Conference on the Biology and Culture of Tilapias, 2-5 September 1980 at the Study and Conference Center of the Rockefeller Foundation, Bellagio, Italy / sponsored by the International Center for Living Aquatic Resources Management, Manila ; edited by R.S.V. Pullin and R.H. Lowe-McConnell / RogerS.V Pullin, R.H Lowe-McConnell, InternationalCenterforLivingAquaticResourcesManagement, ほか