Brady, N. C., & Weil, R. R. (2008). The nature and properties of soils (14a. ed.). Pearson Education Ltd.

Brady, Nyle C., and Ray R. Weil. The Nature and Properties of Soils. 14a. ed. Upper Saddle River: Pearson Education Ltd, 2008.

Brady, Nyle C., and Ray R. Weil. The Nature and Properties of Soils. 14a. ed. Pearson Education Ltd, 2008.