Abu-El-Hamd, M., Metwally, A., El-Diahy, Y., Soliman , S. and Ghazy, A. 2024. Effect of L-tryptophan on growth performance, blood parameters and immunoresponse of Friesian calves. Journal of the Hellenic Veterinary Medical Society. 75, 1 (Apr. 2024), 6863–6870. DOI:https://doi.org/10.12681/jhvms.32662.