(1998). Drylands: Sustainable use of rangelands into the twenty-first century. Rome, Italy: IFAD.
Dyfyniad Arddull ChicagoDrylands: Sustainable Use of Rangelands Into the Twenty-first Century. Rome, Italy: IFAD, 1998.
Dyfyniad MLADrylands: Sustainable Use of Rangelands Into the Twenty-first Century. Rome, Italy: IFAD, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.