Nicol, K. J., Heady, E. O., & Madsen, H. C. (1974). Models of soil loss, land and water use spatial agricultural structure, and the environment. Center for Agricultural and Rural Development.
Chicago-Zitierstil (17. Ausg.)Nicol, Kenneth J., Earl O. Heady, und Howard C. Madsen. Models of Soil Loss, Land and Water Use Spatial Agricultural Structure, and the Environment. Ames, Iowa: Center for Agricultural and Rural Development, 1974.
MLA-Zitierstil (9. Ausg.)Nicol, Kenneth J., et al. Models of Soil Loss, Land and Water Use Spatial Agricultural Structure, and the Environment. Center for Agricultural and Rural Development, 1974.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.