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Eighth international congress on the applications of plastics in agriculture, Lisbon, Portugal, 6 - 11 October 1980 / [with contrib. by Mikiyo Kageyama...et al.].
- United Nations Industrial Development Organization,
- 1980.
- [Vienna] :
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Round-table ministerial meeting on agro-industry development, Baghdad, Iraq, 19-24 January 1981 : papers / by S. Al-Naddaf...[et al.].
- United Nations Industrial Development Organization,
- 1980.
- [Vienna] :
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Meeting on exchange of experiences and co-operation among developing countries in the development of agricultural machinery industry, Beijing, China, 20 - 27 October 1980 / [with contrib. by Chak Chakkaphak...et al.].
- United Nations Industrial Development Organization,
- 1980.
- [Vienna] :