1. Proc. 1st, 2nd Carbon Conf.;Collins,1956
2. Paper Presented at the Seventh Biennial Carbon Conf.;Volk,1956
3. Paper Presented at the Eight Biennial Carbon Conf.;Noda,1967
4. X-ray characteristics of non-graphitizing-type carbon
5. Paper Presented at the Eight Biennial Carbon Conf.;Noda,1967