Blog on education, science, and economy, by Nguyen Tien Zung
Tài liệu rất đáng đọc này đã được bà Phạm Thị Ly dịch sang tiếng Việt, muốn chia sẻ ở đây với những ai quan tâm đến khoa học:
DG GDDH so 3 – Tuyen ngon San Francisco
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