(1961). Economics of watershed planning. Ames, Iowa: The lowa State University Press.
Chicago Stili AlıntıEconomics of Watershed Planning. Ames, Iowa: The lowa State University Press, 1961.
MLA AlıntıEconomics of Watershed Planning. Ames, Iowa: The lowa State University Press, 1961.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..