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Seminar for high-level governmental and corporate officials "Bauxite, alumina, aluminium : analysis of demand for decisions on industrial development", Budapest, Hungary, 3-12 May 1978 : report / United Nations industrial development organization.
- UNIDO,
- 1978.
- [Vienna] :
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Appropriate technologies for small-scale production of cement and cementitious materials : background paper / by Intermediate technology development group ; prep. by R.J.S. Spence.
- UNIDO,
- 1978.
- [Vienna] :