1. AOYAMA, Y., KURATA, K., HONDO, R. AND OGIWARA, H. (1974) : Demonstration of viral antigens. in herpes simplex and varicella-zoster infections. Recent Advan. RES Res., 14, 90-104.
2. DUMBELL, K. R. (1968) : Laboratory aids to the control of smallpox in countries where the disease is not endemic. Progr. Med. Virol., 10, 388-397.
3. EL-GRANZOURY, A. L. A. (1967) : Evaluation of the fluorescent antibody technique for the diag-nosis of smallpox. J. Clin. Pathol., 20, 879-882.
4. KAWAMURA, A. Jr., Ed. (1969) : Fluorescent antibody techniques and their applications. Tokyo University Press. Tokyo (Second edition: June, 1977) .
5. KITAMURA, T. (1968) : Studies on the formation of hyperplastic focus by variola virus in human cell cultures. I. In vitro quantitation of variola virus by focus counting in HeLa and FL cell cultures. Virology, 36, 174-179.