Herrera, J., Rodríguez, S., Rojas, J. F., Herrera, É., & Chaves, M. (2013). Temporal and spatial variation in the quality of surface water in the subwatershed of the Virilla river (Costa Rica) between 2006 and 2010.

Herrera, Jorge, Susana Rodríguez, José F. Rojas, Éricka Herrera, và María Chaves. Temporal and Spatial Variation in the Quality of Surface Water in the Subwatershed of the Virilla River (Costa Rica) between 2006 and 2010. 2013.

Herrera, Jorge, et al. Temporal and Spatial Variation in the Quality of Surface Water in the Subwatershed of the Virilla River (Costa Rica) between 2006 and 2010. 2013.