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  <controlfield tag="008">210402s9999    xx            000 0 und d</controlfield>
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   <subfield code="a">Hàm lượng kim loại nặng (As, Cd, Hg) trong đất vùng ven biển huyện Ngọc Hiển tỉnh Cà Mau</subfield>
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   <subfield code="b">(Chuyên ngành: khoa học môi trường)</subfield>
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   <subfield code="c">Nguyễn Văn Tho ; Bùi Thị Nga, Nguyễn Mỹ Hoa giáo viên hướng dẫn</subfield>
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