Weiss M J, Gulati S C, Harter D H, Sweet R W, Spiegelman S, Lopez C
J Gen Virol. 1975 Dec;29(3):335-9. doi: 10.1099/0022-1317-29-3-335.
Hybridization studies with [3H]-cDNA of progressive pneumonia, maedi and visna viruses demonstrate that lung DNA from sheep afflicted with progressive interstitial pneumonia possesses virus-related sequences not present in normal sheep lung DNA.