Nega Tolla, Pravee Vijchulata, Pornsri Chairatanayuth and Suwapong Swsdiphanich (2006) “Comparative Performances of Holstein-Friesian Cows under Smallholder and Large Scale Farmers’ Management in Central Rift Valley, Ethiopia”, Agriculture and Natural Resources. Bangkok, Thailand, 40(1), pp. 58–68. available at: https://li01.tci-thaijo.org/index.php/anres/article/view/243505 (accessed: 17 September 2026).