Acevedo, A. and Burkhart, S. 1998. Seasonal distribution of bottlenose (<i>Tursiops truncatus</i>) and pan-tropical spotted (<i>Stenella attenuata</i>) dolphins (Cetacea: Delphinidae) in Golfo Dulce, Costa Rica. Revista de Biología Tropical. 46, S6 (Dec. 1998), 91–101.