by Wrathall, A.E. (Central Veterinary Lab. Weybridge (UK)), Bailey, J, Done, J.T, Shaw, I.G, Winkler, C.E, Gibbons, D.F, Patterson, D.S.P, Sweasey, D
Published in Zentralblatt für Veterinärmedizin. Reihe B (01.01.1978)

by Wrathall, A.E. (Central Veterinary Lab., New Haw, Weybridge, (UK)), Wells, D.E, Anderson, P.H
Published in Zentralblatt fuer Veterinaermedizin. Reihe A (Germany, F.R.) (1980)