Vargas Zamora, J.A., Acuña-Gonzalez, J., Vásquez, F. and Sibaja-Cordero, J.A. 2016. Brachiopods, sipunculans, enteropneusts and metals from two estuarine tidal flats, Pacific, Costa Rica. Revista de Biología Tropical. 64, 3 (Sep. 2016), 1311–1331. DOI:https://doi.org/10.15517/rbt.v64i3.23251.