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 The change of gateway to delta from 12th to 17,h centuries.
<strong>VNU Journal of Science: Social Sciences and Humanities</strong>, [S.l.], v. 18, n. 1E, mar. 2002.
Available at: &lt;<a href="https://js.vnu.edu.vn/SSH/article/view/3211" target="_new">https://js.vnu.edu.vn/SSH/article/view/3211</a>&gt;. Date accessed: 17 may 2024.