How does a water tap work ? Michael Moravcsik and R. H. B. Exell explain why knowing the answer can be a breakthrough for an African village.
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Moravcsik, M., Exell, R. Third World needs ‘barefoot’ science. Nature 276, 315–316 (1978). https://doi.org/10.1038/276315a0
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DOI: https://doi.org/10.1038/276315a0