1. Vorkommen und Verbreitung von Picodna-(Parvo-) Virus beim Schwein;Bachmann;Zbl. Vet. Med. B,1969
2. Viruses isolated in association with herd infertility, abortions and stillbirths in pigs;Cartwright;Vet. Rec.,1967
3. Some respiratory virus and mycoplasma infections of animals;Darbyshire;J. Clin. Pathol.,1968
4. Characterization of a small porcine DNA virus;Mayr;Arch. ges. Virusforsch.,1968