Publisher
Springer Science and Business Media LLC
Reference2 articles.
1. Clark, D. C., Brit. Med. J., ii, 1544 (1956). Graff, T. D., and Phillips, O. C., J. Amer. Med. Assoc., 170, 2069 (1959). Winterbottom, E. H., Brit. Med. J., i, 247 (1950).
2. Finn, C., Vet. Rec., 70, 290 (1958).