A Comparative Assessment of Efficacy of Currently Applied Vaccines in Broiler Chicken against Individual and Co-Infection with Field Prevailing Newcastle Disease and Infectious Bronchitis Viruses. - Imran, Muhammad Saeed; Aslam, Asim; Yasin, Muhammad; Yaqoob, Tahir; Zahid, Beenish (Pakistan Journal of Zoology, 2020)