Daines, D. R., & Heady, E. O. (1980). Potential effects of policy alternatives on regional and national soil loss. Ames: Center for Agricultural and Rural Development. Iowa State University.
Παραπομπή Chicago StyleDaines, David R., and Earl O. Heady. Potential Effects of Policy Alternatives On Regional and National Soil Loss. Ames: Center for Agricultural and Rural Development. Iowa State University, 1980.
Παραπομπή MLADaines, David R., and Earl O. Heady. Potential Effects of Policy Alternatives On Regional and National Soil Loss. Ames: Center for Agricultural and Rural Development. Iowa State University, 1980.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.