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- [4] PREPARATION OF LOW-LOSS FLUORIDE GLASS-FIBERS JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 1982, 21 (01): : L55 - L56
- [5] PREPARATION OF LOW-LOSS MULTICOMPONENT GLASS-FIBER REVIEW OF THE ELECTRICAL COMMUNICATIONS LABORATORIES, 1979, 27 (1-2): : 123 - 129