WIDODO, S. (1978). Indentifying Constraints In Higher Rice Yield In Yogyakarta - Indonesia Sri Widodo. UGM.
Lua i Stíl Chicago (17ú heag.)WIDODO, SRI. Indentifying Constraints In Higher Rice Yield In Yogyakarta - Indonesia Sri Widodo. UGM, 1978.
Lua MLA (8ú heag.)WIDODO, SRI. Indentifying Constraints In Higher Rice Yield In Yogyakarta - Indonesia Sri Widodo. UGM, 1978.
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