Inland variability of carbon-nitrogen concentrations and delta (super 13) C in Amazon floodplain (varzea) vegetation and sediment - Martinelli, Luiz Antonio; Gat, Joel R; Victoria, Reynaldo Luiz; Camargo, Plinio Barbosa de; Piccolo, Marisa de Cassia; Mertes, Leal; Richey, Jeffrey Edward; Devol, Allan H; Forsberg, Bruce R; Seyler, P. T; Peters, Norman E (Hydrological Processes, 2003)