Field demostration its effects on level of knowledge, understanding and ittitudes of farmers about choice of a rice variety and use of fertilizers [microform]
| المؤلف الرئيسي: | |
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| التنسيق: | Visual Material |
| منشور في: |
Quezon City
Photoduplication Service. University of the Philippines Library
1977.
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| الموضوعات: |