Graham, M., & Sharp, D. (1982). Village handpump technology: Research and evaluation in Asia. International Development Research Centre.
Citace podle Chicago (17th ed.)Graham, Michael, a Donald Sharp. Village Handpump Technology: Research and Evaluation in Asia. Ottawa, Canada: International Development Research Centre, 1982.
Citace podle MLA (9th ed.)Graham, Michael, a Donald Sharp. Village Handpump Technology: Research and Evaluation in Asia. International Development Research Centre, 1982.
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