Ficken, M D Marek's disease virus isolates with unusual tropism and virulence for ocular tissues: clinical findings, challenge studies and pathological features. [electronic resource] - Avian pathology : journal of the W.V.P.A Sep 1991 - 461-74 p. digital Publication Type: Journal Article ISSN: 0307-9457 Standard No.: 10.1080/03079459108418784 doi