ΜΑΣΤΓΟΓΙΑΝΝΗ Μ., ΜΑΓΓΑΝΑ Ο., ΣΕΪΜΕΝΗΣ Α. and ΣΚΟΥΛΑΣ Ε. 2019. Slow virus diseases of the sheep in Greece. II. Laboratory diagnosis of Progressive Pneumonia ( Maedi). Journal of the Hellenic Veterinary Medical Society. 34, 3 (Dec. 2019), 225–229. DOI:https://doi.org/10.12681/jhvms.21599.