BOUGIOUKLIS (Π. ΜΠΟΥΠΟΥΚΛΗΣ) P., GEORGOPOULOU (Ι. ΓΕΩΡΓΟΠΟΥΛΟΥ) I. and IORDANIDIS (Π. ΙΟΡΔΑΝΙΔΗΣ) P. 2017. Determination of breakthrough maternal antibodies titres by two intermediate and two intermediate plus vaccine strains against Gumboro disease, in commercial broilers. Journal of the Hellenic Veterinary Medical Society. 55, 3 (Dec. 2017), 217–225. DOI:https://doi.org/10.12681/jhvms.15097.