FOUZI A. MOHAMMED et al. 2020. The effect of dietary methionine levels on growth, feed conversion and protein retention efficiency of Nile Tilapia (Oreochromis niloticus) fingerlings . Nusantara Bioscience. 12, 1 (Jan. 2020). DOI:https://doi.org/10.13057/nusbiosci/n120104.