1. Dinter, Z.: Relationship between bovine virus diarrhoea virus and hog cholera virus. Zbl. Bakt. I. Abt. Orig.188, 475?486 (1963).
2. Kobayashi, K., andY. Konno: Propagation and titration of equine infectious anemia virus in horse leukocyte culture. Nat. Inst. Anim. Hlth Quart.7, 8?20 (1967).
3. M�hlmann, H., undH. Gralheer: Gr��enbestimmung des Virus der infekti�sen An�mie der Einhufer durch Ultrafiltration. Arch. exp. Vet.-Med.8, 199?203 (1954).
4. Nakajima, H., andJ. Obara: Ether susceptibility of equine infectious anemia virus. Nat. Inst. Anim. Hlth Quart.4, 129?134 (1964).
5. Nakajima, H., C. Ushimi, andJ. Obara: Physicochemical studies on equine infectious anemia virus. ? Examination of purification methods. Nat. Inst. Anim. Hlth Quart.7, 21?27 (1967).