Spongberg, A. L., Witter, J. D., Acuña González, J., Vargas Zamora, J. A., Murillo Castro, M. M., Umaña Villalobos, G., . . . Pérez Rojas, G. (2011). Reconnaissance of selected PPCP compounds in Costa Rican surface waters.

Spongberg, Alison L., Jason D. Witter, Jenaro Acuña González, José A. Vargas Zamora, Manuel María Murillo Castro, Gerardo Umaña Villalobos, Eddy Gómez Ramírez, y Greivin Pérez Rojas. Reconnaissance of Selected PPCP Compounds in Costa Rican Surface Waters. 2011.

Spongberg, Alison L., et al. Reconnaissance of Selected PPCP Compounds in Costa Rican Surface Waters. 2011.