Kamaldeep, P. Sharma, N. Jindal, and G. Narang, “Occurrence of Marek`s Disease in Vaccinated Poultry Flocks of Haryana (India)”, Int. J. Poult. Sci., vol. 6, no. 5, pp. 372–377, Apr. 2007, doi: 10.3923/ijps.2007.372.377.