Biological monitoring organochlorine pesticides using Anodonties trapesialis (Lam, 1819),(Bivalvia: mycetopodidae) in a lotic environment - urban sewage - Avelar, Wagner Eustáquio Paiva; Souza, Antônio D G; Lopes, João Luís Callegari; Casanova, Isabel C (Ciência e Cultura, 1998)