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Agricultural extension : the training and visit system / Daniel Benor, James Q. Harrison, and Michael Baxter.
- World Bank,
- cop. 1984.
- Washington, DC :
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Manual on the design, construction and maintenance of low-cost pour-flush waterseal latrines in India / by A.K. Roy...[et al.].
- 856.1
- World Bank,
- cop. 1984.
- Washington, DC :