Lisnahan , C.V. and Nahak, O.R. 2019. Effects of L-Threonine and L-Tryptophan Supplementation on Growth Performance of Native Chickens during the Grower Phase. International Journal of Poultry Science. 18, 12 (Nov. 2019), 570–575. DOI:https://doi.org/10.3923/ijps.2019.570.575.