(1961). Economics of watershed planning. Ames, Iowa: The lowa State University Press.
Chicago Style aipamenaEconomics of Watershed Planning. Ames, Iowa: The lowa State University Press, 1961.
MLA aipamenaEconomics of Watershed Planning. Ames, Iowa: The lowa State University Press, 1961.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.