1. Cihak, A. Oncology 30, 405–422 (1974).
2. Karon, M. et al. Blood 42, 359–365 (1973).
3. Weiss, A. J., Stambaugh, J. E., Mastrangelo, M. J., Laucius, J. F. & Bellet, R. E. Cancer Chem. Rep. 56, 413–419 (1972).
4. Benedict, W. F., Banerjee, A., Gardner, A. & Jones, P. A. Cancer Res. (in the press).
5. Reznikoff, C. A., Brankow, D. W. & Heidelberger, C. Cancer Res. 33, 3231–3238 (1973).