Trace elements in biomaterials and soils from a Yellow-legged gull ( Larus michahellis ) colony in the Atlantic Islands of Galicia National Park (NW Spain) - Otero, X. L; de la Peña-Lastra, S; Romero, D; Nobrega, G. N; Ferreira, Tiago Osório; Pérez-Alberti, A (Marine Pollution Bulletin, 2018)