Schwab, G. O., Fangmeier, D. D., Elliot, W. J., & Fangmeier, D. D. (1996). Soil and water management systems (4th ed.). New York: John Wiley.
Παραπομπή Chicago StyleSchwab, Glen Orville, D. D. Fangmeier, William J. Elliot, and Delmar D. Fangmeier. Soil and Water Management Systems. 4th ed. New York: John Wiley, 1996.
Παραπομπή MLASchwab, Glen Orville, D. D. Fangmeier, William J. Elliot, and Delmar D. Fangmeier. Soil and Water Management Systems. 4th ed. New York: John Wiley, 1996.
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