Merkel, B., Planer-Friedrich, B., & Nordstrom, D. (2008). Groundwater Geochemistry: A Practical Guide to Modeling of Natural and Contaminated Aquatic Systems. Groundwater Geochemistry, by B.J. Merkel and B. Planer-Friedrich. Edited by D.K. Nordstrom. Berlin: Springer, 2008. ISBN: 978-3-540-74667-6, .