Dương, V. N. (1990). Watermanagement on acid sulphate soils: Experiment E-73. Wageningen: Wageningen Agricultural Univ.
Dyfyniad Arddull ChicagoDương, Văn Ni. Watermanagement On Acid Sulphate Soils: Experiment E-73. Wageningen: Wageningen Agricultural Univ, 1990.
Dyfyniad MLADương, Văn Ni. Watermanagement On Acid Sulphate Soils: Experiment E-73. Wageningen: Wageningen Agricultural Univ, 1990.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.