Environmental impact of the golden snail (Pomacea sp.) on the farming systems in the Philippines Summary report of the Workshop held at the Freshwater Aquaculture Ctr. CLSU, Nueva Ecija, Philippines, 9-10 November 1989 - Acosta, Belen. O., ed; Pullin, R. S. V., jt. ed (ICLARM Conference Proceedings, 1991)