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Basic needs and resources : possibilities for economical development in five villages in the Monaragala-District, Sri Lanka / Marius van der Plas, Herman Snelder.
- University of technology. Faculty of industrial engineering. Department of appropriate technology,
- 1977.
- Eindhoven :
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Appropriate technology : a studium generale course / Ch.J.L. Bertholet...[et al.].
- Technische hogeschool. Buro studium generale,
- 1977.
- Eindhoven :