Acid rain and nitrogen deposition in a sub-tropical watershed (Piracicaba): ecosystem consequences - Krusche, Alex Vladimir; Camargo, Plinio Barbosa de; Cerri, Carlos Eduardo Pelegrino; Ballester, Maria Victoria Ramos; Lara, Luciene de Barros Lorandi Silveira; Victoria, Reynaldo Luiz; Martinelli, Luiz Antonio (Environmental Pollution, 2003)