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Towards global action for appropriate technology : expert meeting on international action for appropriate technology, Geneva, 1977 / ed. by A.S. Bhalla ; forew. by Jan de Koning.
- Pergamon,
- 1979.
- Oxford [etc.] :
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Poverty : wealth of mankind / by Albert Tévoédjrè ; forew. by Jan Tinbergen and Dom Helder Camara.
- Pergamon,
- 1979.
- Oxford [etc.] :