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- [33] MARK,HF - ENCYCLOPEDIA OF POLYMER SCIENCE AND TECHNOLOGY - AMINO RESINS TO CASEIN CHIMICA & L INDUSTRIA, 1966, 48 (08): : 914 - &
- [34] ANON - ENCYCLOPEDIA OF CHEMICAL TECHNOLOGY . ELECTRON TUBE MATERIALS TO FERRITIES CHIMICA & L INDUSTRIA, 1966, 48 (07): : 806 - &