(1961). Economics of watershed planning. Ames, Iowa: The lowa State University Press.
シカゴスタイル引用形Economics of Watershed Planning. Ames, Iowa: The lowa State University Press, 1961.
MLA引用形式Economics of Watershed Planning. Ames, Iowa: The lowa State University Press, 1961.
警告: この引用は必ずしも正確ではありません.