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- [2] INTERNATIONAL CLAY CONFERENCE 1963 ZEITSCHRIFT FUR ANGEWANDTE GEOLOGIE, 1966, 12 (04): : 219 - &
- [3] INTERNATIONAL CLAY CONFERENCE 1963 JOURNAL OF SCIENTIFIC & INDUSTRIAL RESEARCH, 1965, 24 (07): : 382 - &
- [5] 12th International Clay Conference 2001 - A Clay Odyssey ZI, Ziegelindustrie International/Brick and Tile Industry International, 2001, (04):