... This suggests that 15) M. Iwanami, M. Murakami, K. Takahashi, M. Fujimoto, T. Shibanuma, R. Kawai, and T. Takenaka, Jpn. Patent (Kokai) 109384 (1974). 16) T. Takcnaka, Kiso to Riv-ska, 8, 51 (1974). NIT—Electronic Library Service Page 11. 1436 ' Vol. ...