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3
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Some telephone problems in developing countries / by H.K. Ebenberger.
- United Nations Industrial Development Organization,
- 1969.
- [Vienna] :
-
Problems of manufacturing and marketing agricultural machines in developing countries / by H. Nüchtern.
- United Nations Industrial Development Organization,
- 1969.
- [Vienna] :
-
Practical problems encountered in the oil seed processing and related industries in the developing countries of Asia and the Far East / by H. Reddy.
- 850.1
- United Nations Industrial Development Organization,
- 1969.
- [Vienna] :