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  <controlfield tag="008">210402s9999    xx            000 0 und d</controlfield>
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   <subfield code="a">Viên, Quốc Bình</subfield>
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   <subfield code="a">Đánh giá hiệu quả sản xuất của nông hộ nuôi tôm thẻ chân trắng thâm canh ở tỉnh Trà Vinh :</subfield>
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   <subfield code="b">Luận văn tốt nghiệp thạc sĩ nghành. Kinh tế Nông nghiệp</subfield>
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   <subfield code="c">Viên Quốc Bình ; Dương Ngọc Thành (Hướng dẫn khoa học)</subfield>
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   <subfield code="a">Shrimp culture,Nuôi tôm</subfield>
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   <subfield code="x">Economic aspects,Khía cạnh kinh tế</subfield>
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   <subfield code="a">Trung tâm Học liệu Trường Đại học Cần Thơ</subfield>
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