Reference
Valverde, 2003. In: Weed Management for Developing Countries- Addendum 1.Edited by R. Labrada. Food And Agriculture Organization of the United Nations, Rome, 2003
Valverde, 2003. In: Weed Management for Developing Countries- Addendum 1.Edited by R. Labrada. Food And Agriculture Organization of the United Nations, Rome, 2003