1. AYUZAWA, C. (1972) J. Sericult. Sci. Jpn. 41:338- 344 (in Japanese with an English summary).
2. CHI, Y. Y. and A. R. BASSEI. (1974) .J. Virol. 13: 1194-1199.
3. EVENSON, D. P. (1977) In Methods in Virology. Vol. 6 (K. MARAMOROSCII and H. KOPROWSKI,eds.) Academic Press, New York, pp. 219-264.
4. HASHIMOTO, Y. and S. KAWASE (1983). J. Inver tebr. Pathol. 41: 68-76.
5. HASHIMOTO, V., A. WATANABE and S. KAWASE (1984 a) Biochim. Biophys. Acta 781: 76-80.