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Deep placement fertilizer applicator project : July 1 to December 31, 1984 / by Amir U. Khan.
- International rice research institute (IRRI). Agricultural engineering department,
- 1984.
- Manila :
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Estimates of the total external debt of the developing member countries of ADB: 1981-1983 / by I.P. David.
- Asian Development Bank. Economics office,
- 1984.
- Manila :