1. 2) R. B. SNOW: Blast Furnace, Coke Oven, and Raw Materials Comm. Proc., 18 (1960), p.429 453
2. 3) O. NYQUIST: Agglomeration Intern. Symp.Philadelphia Pa.,(1961), p.809-864
3. 4) S. WATANABE: Agglomeration Intern. Symp.Philadelphia Pa.,(1961), p.865-900
4. 5) S. B. HOLMQUIST: Nature, 185 (1960), p.604
5. 6) B. PHILLIPS and A. MUAN: Trans. Met. Soc. AIME, 218 (1960), p.1112-1118