Biological constraints to high yields on some rice farms in Nueva Ecija, Philippines [microform]
| প্রধান লেখক: | |
|---|---|
| বিন্যাস: | Visual Material |
| প্রকাশিত: |
Quezon City
Photoduplication Service. University of the Philippines Library
1981.
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| বিষয়গুলি: |