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\bibitem{Zavala-Hidalgo_etal2006} Zavala-Hidalgo, J., Gallegos-Garc{\'\i}a, A., Mart{\'\i}nez-L{\'o}pez, B., Morey, S. L., \& O{\textquoteright}Brien, J. J. (2006). Seasonal upwelling on the Western and Southern Shelves of the Gulf of Mexico. \textit{Ocean Dynamics}, \textit{56}(3-4), 333--338.

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