Greenland, D. J. (1977). Soil conservation and management in the humid tropics. John Wiley and Sons.
Dyfyniad Arddull ChicagoGreenland, D J. Soil Conservation and Management in the Humid Tropics. New York: John Wiley and Sons, 1977.
Dyfyniad MLAGreenland, D J. Soil Conservation and Management in the Humid Tropics. John Wiley and Sons, 1977.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.