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Modest technologies for a complicated world / by Roberto Vacca.
- Pergamon,
- 1980.
- Oxford [etc.] :
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Water management for arid lands in developing countries : papers from the Training workshop on water management for arid regions organized by the Ministry of irrigation, Government of Egypt in co-operation with the United Nations environment programme, Cairo, Egypt, 2-14 December 1978 / ed. Asit K. Biswas...[et al.].
- Pergamon,
- 1980.
- Oxford [etc.] :